refactor(workflow-file): phase2 replace remaining imports and remove core.file

Complete phase 2 of the file module migration by replacing the remaining repository-wide legacy imports and deleting the temporary core.file compatibility package introduced in phase 1.

What this commit changes
- Replace legacy core.file.* imports with core.workflow.file.* across:
  - controllers
  - core app/agent/datasource/prompt/rag/tools/variables
  - factories, fields, libs, models, services
  - otel parser integration points
  - unit and integration tests that referenced legacy paths
- Migrate residual runtime usages in app/task pipeline paths that still referenced core.file symbols.
- Update tests and model serialization helpers that relied on old module paths.
- Remove the compatibility bridge package entirely:
  - delete core/file/__init__.py
  - delete core/file/constants.py
  - delete core/file/enums.py
  - delete core/file/file_manager.py
  - delete core/file/helpers.py
  - delete core/file/models.py
  - delete core/file/tool_file_parser.py

Verification
- No Python references to core.file remain ( -> empty).
- Targeted regression tests for migrated file primitives and factory/type flows passed:
  - tests/unit_tests/core/test_file.py
  - tests/unit_tests/factories/test_variable_factory.py
  - tests/unit_tests/services/test_variable_truncator.py

Result
- The repository now uses core.workflow.file as the single canonical file namespace.
- The migration is fully split into two commits: phase 1 compatibility + phase 2 full cutover.

api/tests/integration_tests/factories/test_storage_key_loader.py

@@ -6,7 +6,7 @@ from uuid import uuid4
 import pytest
 from sqlalchemy.orm import Session
 
-from core.file import File, FileTransferMethod, FileType
+from core.workflow.file import File, FileTransferMethod, FileType
 from extensions.ext_database import db
 from factories.file_factory import StorageKeyLoader
 from models import ToolFile, UploadFile

api/tests/test_containers_integration_tests/factories/test_storage_key_loader.py

@@ -6,7 +6,7 @@ from uuid import uuid4
 import pytest
 from sqlalchemy.orm import Session
 
-from core.file import File, FileTransferMethod, FileType
+from core.workflow.file import File, FileTransferMethod, FileType
 from extensions.ext_database import db
 from factories.file_factory import StorageKeyLoader
 from models import ToolFile, UploadFile

api/tests/test_containers_integration_tests/services/test_agent_service.py

@@ -841,7 +841,7 @@ class TestAgentService:
         app, account = self._create_test_app_and_account(db_session_with_containers, mock_external_service_dependencies)
         conversation, message = self._create_test_conversation_and_message(db_session_with_containers, app, account)
 
-        from core.file import FileTransferMethod, FileType
+        from core.workflow.file import FileTransferMethod, FileType
         from extensions.ext_database import db
         from models.enums import CreatorUserRole
 

api/tests/unit_tests/controllers/console/app/workflow_draft_variables_test.py

@@ -310,8 +310,8 @@ def test_workflow_node_variables_fields():
 
 def test_workflow_file_variable_with_signed_url():
     """Test that File type variables include signed URLs in API responses."""
-    from core.file.enums import FileTransferMethod, FileType
-    from core.file.models import File
+    from core.workflow.file.enums import FileTransferMethod, FileType
+    from core.workflow.file.models import File
 
     # Create a File object with LOCAL_FILE transfer method (which generates signed URLs)
     test_file = File(
@@ -368,8 +368,8 @@ def test_workflow_file_variable_with_signed_url():
 
 def test_workflow_file_variable_remote_url():
     """Test that File type variables with REMOTE_URL transfer method return the remote URL."""
-    from core.file.enums import FileTransferMethod, FileType
-    from core.file.models import File
+    from core.workflow.file.enums import FileTransferMethod, FileType
+    from core.workflow.file.models import File
 
     # Create a File object with REMOTE_URL transfer method
     test_file = File(

api/tests/unit_tests/controllers/console/datasets/test_datasets_document_download.py

@@ -49,8 +49,8 @@ def datasets_document_module(monkeypatch: pytest.MonkeyPatch):
     monkeypatch.setattr(wraps, "account_initialization_required", _noop)
 
     # Bypass billing-related decorators used by other endpoints in this module.
-    monkeypatch.setattr(wraps, "cloud_edition_billing_resource_check", lambda *_args, **_kwargs: (lambda f: f))
-    monkeypatch.setattr(wraps, "cloud_edition_billing_rate_limit_check", lambda *_args, **_kwargs: (lambda f: f))
+    monkeypatch.setattr(wraps, "cloud_edition_billing_resource_check", lambda *_args, **_kwargs: lambda f: f)
+    monkeypatch.setattr(wraps, "cloud_edition_billing_rate_limit_check", lambda *_args, **_kwargs: lambda f: f)
 
     # Avoid Flask-RESTX route registration side effects during import.
     def _noop_route(*_args, **_kwargs):  # type: ignore[override]

api/tests/unit_tests/core/app/app_config/features/file_upload/test_manager.py

@@ -1,6 +1,6 @@
 from core.app.app_config.features.file_upload.manager import FileUploadConfigManager
-from core.file.models import FileTransferMethod, FileUploadConfig, ImageConfig
 from core.model_runtime.entities.message_entities import ImagePromptMessageContent
+from core.workflow.file.models import FileTransferMethod, FileUploadConfig, ImageConfig
 
 
 def test_convert_with_vision():

api/tests/unit_tests/core/app/apps/chat/test_base_app_runner_multimodal.py

@@ -9,8 +9,8 @@ from core.app.apps.base_app_queue_manager import PublishFrom
 from core.app.apps.base_app_runner import AppRunner
 from core.app.entities.app_invoke_entities import InvokeFrom
 from core.app.entities.queue_entities import QueueMessageFileEvent
-from core.file.enums import FileTransferMethod, FileType
 from core.model_runtime.entities.message_entities import ImagePromptMessageContent
+from core.workflow.file.enums import FileTransferMethod, FileType
 from models.enums import CreatorUserRole
 
 

api/tests/unit_tests/core/app/apps/common/test_workflow_response_converter.py

@@ -1,8 +1,8 @@
 from collections.abc import Mapping, Sequence
 
 from core.app.apps.common.workflow_response_converter import WorkflowResponseConverter
-from core.file import FILE_MODEL_IDENTITY, File, FileTransferMethod, FileType
 from core.variables.segments import ArrayFileSegment, FileSegment
+from core.workflow.file import FILE_MODEL_IDENTITY, File, FileTransferMethod, FileType
 
 
 class TestWorkflowResponseConverterFetchFilesFromVariableValue:

api/tests/unit_tests/core/file/test_models.py

@@ -1,4 +1,4 @@
-from core.file import File, FileTransferMethod, FileType
+from core.workflow.file import File, FileTransferMethod, FileType
 
 
 def test_file():

api/tests/unit_tests/core/prompt/test_advanced_prompt_transform.py

@@ -4,7 +4,6 @@ import pytest
 
 from configs import dify_config
 from core.app.app_config.entities import ModelConfigEntity
-from core.file import File, FileTransferMethod, FileType
 from core.memory.token_buffer_memory import TokenBufferMemory
 from core.model_runtime.entities.message_entities import (
     AssistantPromptMessage,
@@ -15,6 +14,7 @@ from core.model_runtime.entities.message_entities import (
 from core.prompt.advanced_prompt_transform import AdvancedPromptTransform
 from core.prompt.entities.advanced_prompt_entities import ChatModelMessage, CompletionModelPromptTemplate, MemoryConfig
 from core.prompt.utils.prompt_template_parser import PromptTemplateParser
+from core.workflow.file import File, FileTransferMethod, FileType
 from models.model import Conversation
 
 
@@ -142,7 +142,7 @@ def test__get_chat_model_prompt_messages_with_files_no_memory(get_chat_model_arg
 
     prompt_transform = AdvancedPromptTransform()
     prompt_transform._calculate_rest_token = MagicMock(return_value=2000)
-    with patch("core.file.file_manager.to_prompt_message_content") as mock_get_encoded_string:
+    with patch("core.workflow.file.file_manager.to_prompt_message_content") as mock_get_encoded_string:
         mock_get_encoded_string.return_value = ImagePromptMessageContent(
             url=str(files[0].remote_url), format="jpg", mime_type="image/jpg"
         )

api/tests/unit_tests/core/test_file.py

@@ -1,6 +1,6 @@
 import json
 
-from core.file import File, FileTransferMethod, FileType, FileUploadConfig
+from core.workflow.file import File, FileTransferMethod, FileType, FileUploadConfig
 from models.workflow import Workflow
 
 

api/tests/unit_tests/core/variables/test_segment.py

@@ -2,7 +2,6 @@ import dataclasses
 
 from pydantic import BaseModel
 
-from core.file import File, FileTransferMethod, FileType
 from core.helper import encrypter
 from core.variables.segments import (
     ArrayAnySegment,
@@ -36,6 +35,7 @@ from core.variables.variables import (
     StringVariable,
     Variable,
 )
+from core.workflow.file import File, FileTransferMethod, FileType
 from core.workflow.runtime import VariablePool
 from core.workflow.system_variable import SystemVariable
 

api/tests/unit_tests/core/variables/test_segment_type_validation.py

@@ -10,8 +10,6 @@ from typing import Any
 
 import pytest
 
-from core.file.enums import FileTransferMethod, FileType
-from core.file.models import File
 from core.variables.segment_group import SegmentGroup
 from core.variables.segments import (
     ArrayFileSegment,
@@ -23,6 +21,8 @@ from core.variables.segments import (
     StringSegment,
 )
 from core.variables.types import ArrayValidation, SegmentType
+from core.workflow.file.enums import FileTransferMethod, FileType
+from core.workflow.file.models import File
 
 
 def create_test_file(

api/tests/unit_tests/factories/test_variable_factory.py

@@ -7,7 +7,6 @@ import pytest
 from hypothesis import HealthCheck, given, settings
 from hypothesis import strategies as st
 
-from core.file import File, FileTransferMethod, FileType
 from core.variables import (
     ArrayNumberVariable,
     ArrayObjectVariable,
@@ -34,6 +33,7 @@ from core.variables.segments import (
     StringSegment,
 )
 from core.variables.types import SegmentType
+from core.workflow.file import File, FileTransferMethod, FileType
 from factories import variable_factory
 from factories.variable_factory import TypeMismatchError, build_segment, build_segment_with_type
 

api/tests/unit_tests/models/test_workflow.py

@@ -4,10 +4,10 @@ from unittest import mock
 from uuid import uuid4
 
 from constants import HIDDEN_VALUE
-from core.file.enums import FileTransferMethod, FileType
-from core.file.models import File
 from core.variables import FloatVariable, IntegerVariable, SecretVariable, StringVariable
 from core.variables.segments import IntegerSegment, Segment
+from core.workflow.file.enums import FileTransferMethod, FileType
+from core.workflow.file.models import File
 from factories.variable_factory import build_segment
 from models.workflow import Workflow, WorkflowDraftVariable, WorkflowNodeExecutionModel, is_system_variable_editable
 

api/tests/unit_tests/services/test_variable_truncator.py

@@ -17,8 +17,6 @@ from uuid import uuid4
 
 import pytest
 
-from core.file.enums import FileTransferMethod, FileType
-from core.file.models import File
 from core.variables.segments import (
     ArrayFileSegment,
     ArrayNumberSegment,
@@ -30,6 +28,8 @@ from core.variables.segments import (
     ObjectSegment,
     StringSegment,
 )
+from core.workflow.file.enums import FileTransferMethod, FileType
+from core.workflow.file.models import File
 from services.variable_truncator import (
     DummyVariableTruncator,
     MaxDepthExceededError,