feat(enterprise): Add OTEL telemetry with slim traces, metrics, and structured logs

- Add EnterpriseOtelTrace handler with span emission for workflows and nodes
- Implement minimal-span strategy: slim spans + detailed companion logs
- Add deterministic span/trace IDs for cross-workflow trace correlation
- Add metric collection at 100% accuracy (counters & histograms)
- Add event handlers for app lifecycle and feedback telemetry
- Add cross-workflow trace linking with parent context propagation
- Add OTEL exporter with configurable sampling and privacy controls
- Wire enterprise telemetry into workflow execution pipeline
- Add telemetry configuration in enterprise configs

api/enterprise/telemetry/draft_trace.py

@@ -0,0 +1,77 @@
+from __future__ import annotations
+
+from collections.abc import Mapping
+from typing import Any
+
+from core.ops.entities.trace_entity import TraceTaskName
+from core.ops.ops_trace_manager import TraceQueueManager, TraceTask
+from core.workflow.enums import WorkflowNodeExecutionMetadataKey
+from enterprise.telemetry.exporter import is_enterprise_telemetry_enabled
+from models.workflow import WorkflowNodeExecutionModel
+
+
+def enqueue_draft_node_execution_trace(
+    *,
+    execution: WorkflowNodeExecutionModel,
+    outputs: Mapping[str, Any] | None,
+    workflow_execution_id: str | None,
+    user_id: str,
+) -> None:
+    if not is_enterprise_telemetry_enabled():
+        return
+
+    trace_manager = TraceQueueManager(app_id=execution.app_id, user_id=user_id)
+    node_data = _build_node_execution_data(
+        execution=execution,
+        outputs=outputs,
+        workflow_execution_id=workflow_execution_id,
+    )
+    trace_manager.add_trace_task(
+        TraceTask(
+            TraceTaskName.DRAFT_NODE_EXECUTION_TRACE,
+            node_execution_data=node_data,
+        )
+    )
+
+
+def _build_node_execution_data(
+    *,
+    execution: WorkflowNodeExecutionModel,
+    outputs: Mapping[str, Any] | None,
+    workflow_execution_id: str | None,
+) -> dict[str, Any]:
+    metadata = execution.execution_metadata_dict
+    node_outputs = outputs if outputs is not None else execution.outputs_dict
+    execution_id = workflow_execution_id or execution.workflow_run_id or execution.id
+
+    return {
+        "workflow_id": execution.workflow_id,
+        "workflow_execution_id": execution_id,
+        "tenant_id": execution.tenant_id,
+        "app_id": execution.app_id,
+        "node_execution_id": execution.id,
+        "node_id": execution.node_id,
+        "node_type": execution.node_type,
+        "title": execution.title,
+        "status": execution.status,
+        "error": execution.error,
+        "elapsed_time": execution.elapsed_time,
+        "index": execution.index,
+        "predecessor_node_id": execution.predecessor_node_id,
+        "created_at": execution.created_at,
+        "finished_at": execution.finished_at,
+        "total_tokens": metadata.get(WorkflowNodeExecutionMetadataKey.TOTAL_TOKENS, 0),
+        "total_price": metadata.get(WorkflowNodeExecutionMetadataKey.TOTAL_PRICE, 0.0),
+        "currency": metadata.get(WorkflowNodeExecutionMetadataKey.CURRENCY),
+        "tool_name": (metadata.get(WorkflowNodeExecutionMetadataKey.TOOL_INFO) or {}).get("tool_name")
+        if isinstance(metadata.get(WorkflowNodeExecutionMetadataKey.TOOL_INFO), dict)
+        else None,
+        "iteration_id": metadata.get(WorkflowNodeExecutionMetadataKey.ITERATION_ID),
+        "iteration_index": metadata.get(WorkflowNodeExecutionMetadataKey.ITERATION_INDEX),
+        "loop_id": metadata.get(WorkflowNodeExecutionMetadataKey.LOOP_ID),
+        "loop_index": metadata.get(WorkflowNodeExecutionMetadataKey.LOOP_INDEX),
+        "parallel_id": metadata.get(WorkflowNodeExecutionMetadataKey.PARALLEL_ID),
+        "node_inputs": execution.inputs_dict,
+        "node_outputs": node_outputs,
+        "process_data": execution.process_data_dict,
+    }