feat(api): Implement EventManager error logging and add coverage (#29204)

- Ensure `EventManager._notify_layers` logs exceptions instead of silently swallowing them 
  so GraphEngine layer failures surface for debugging
- Introduce unit tests to assert the logger captures the runtime error when collecting events
- Enable the `S110` lint rule to catch `try-except-pass` patterns
- Add proper error logging for existing `try-except-pass` blocks.

api/services/tools/workflow_tools_manage_service.py

@@ -1,4 +1,5 @@
 import json
+import logging
 from collections.abc import Mapping
 from datetime import datetime
 from typing import Any
@@ -19,6 +20,8 @@ from models.tools import WorkflowToolProvider
 from models.workflow import Workflow
 from services.tools.tools_transform_service import ToolTransformService
 
+logger = logging.getLogger(__name__)
+
 
 class WorkflowToolManageService:
     """
@@ -198,7 +201,7 @@ class WorkflowToolManageService:
                 tools.append(ToolTransformService.workflow_provider_to_controller(provider))
             except Exception:
                 # skip deleted tools
-                pass
+                logger.exception("Failed to load workflow tool provider %s", provider.id)
 
         labels = ToolLabelManager.get_tools_labels([t for t in tools if isinstance(t, ToolProviderController)])