fix(telemetry): ensure CE safety for enterprise-only imports and DB lookups

- Move enqueue_draft_node_execution_trace import inside call site in workflow_service.py
- Make gateway.py enterprise type imports lazy (routing dicts built on first call)
- Restore typed ModelConfig in llm_generator method signatures (revert dict regression)
- Fix generate_structured_output using wrong key model_parameters -> completion_params
- Replace unsafe cast(str, msg.content) with get_text_content() across llm_generator
- Remove duplicated payload classes from generator.py, import from core.llm_generator.entities
- Gate _lookup_app_and_workspace_names and credential lookups in ops_trace_manager behind is_enterprise_telemetry_enabled()

api/extensions/otel/parser/base.py

@@ -14,14 +14,13 @@ from opentelemetry.trace import Span
 from opentelemetry.trace.status import Status, StatusCode
 from pydantic import BaseModel
 
+from configs import dify_config
 from core.file.models import File
 from core.variables import Segment
 from core.workflow.enums import NodeType
 from core.workflow.graph_events import GraphNodeEventBase
 from core.workflow.nodes.base.node import Node
 from extensions.otel.semconv.gen_ai import ChainAttributes, GenAIAttributes
-from configs import dify_config
-
 
 
 def should_include_content() -> bool:
@@ -34,6 +33,7 @@ def should_include_content() -> bool:
         return True
     return dify_config.ENTERPRISE_INCLUDE_CONTENT
 
+
 def safe_json_dumps(obj: Any, ensure_ascii: bool = False) -> str:
     """
     Safely serialize objects to JSON, handling non-serializable types.