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/core/workflow/graph_engine/event_management/event_manager.py

@@ -2,6 +2,7 @@
 Unified event manager for collecting and emitting events.
 """
 
+import logging
 import threading
 import time
 from collections.abc import Generator
@@ -12,6 +13,8 @@ from core.workflow.graph_events import GraphEngineEvent
 
 from ..layers.base import GraphEngineLayer
 
+_logger = logging.getLogger(__name__)
+
 
 @final
 class ReadWriteLock:
@@ -180,5 +183,4 @@ class EventManager:
             try:
                 layer.on_event(event)
             except Exception:
-                # Silently ignore layer errors during collection
-                pass
+                _logger.exception("Error in layer on_event, layer_type=%s", type(layer))

api/core/workflow/graph_engine/manager.py

@@ -6,12 +6,15 @@ using the new Redis command channel, without requiring user permission checks.
 Supports stop, pause, and resume operations.
 """
 
+import logging
 from typing import final
 
 from core.workflow.graph_engine.command_channels.redis_channel import RedisChannel
 from core.workflow.graph_engine.entities.commands import AbortCommand, GraphEngineCommand, PauseCommand
 from extensions.ext_redis import redis_client
 
+logger = logging.getLogger(__name__)
+
 
 @final
 class GraphEngineManager:
@@ -57,4 +60,4 @@ class GraphEngineManager:
         except Exception:
             # Silently fail if Redis is unavailable
             # The legacy control mechanisms will still work
-            pass
+            logger.exception("Failed to send graph engine command %s for task %s", command.__class__.__name__, task_id)