fix(ci): resolve ruff SIM105, E501, W291 lint errors in PR #11197 changes

- events.py: add missing contextlib import, use contextlib.suppress for
  TypeError/AttributeError try/except (SIM105)
- reactive.py: fix docstring line length (E501), remove trailing whitespace (W291)
- logging_bus.py: fix docstring line length (E501), remove trailing whitespace (W291)

src/cleveragents/a2a/events.py

@@ -15,6 +15,7 @@ publishes translated :class:`A2aEvent` instances to an event queue.
 
 from __future__ import annotations
 
+import contextlib
 import json
 from collections.abc import Callable
 from typing import Any, ClassVar
@@ -277,10 +278,8 @@ class EventBusBridge:
         if self._subscribed_types is None:
             return
         for et in self._subscribed_types:
-            try:
+            with contextlib.suppress(TypeError, AttributeError):
                 self._event_bus.unsubscribe(et, self._on_domain_event)
-            except (TypeError, AttributeError):
-                pass
         self._subscribed_types = None
         logger.info("a2a.event_bridge.stopped")
 

src/cleveragents/infrastructure/events/logging_bus.py

@@ -114,7 +114,8 @@ class LoggingEventBus:
 
         Args:
             event_type: The :class:`EventType` to stop listening for.
-            handler: The callable to remove (must be the same object passed to subscribe).
+            handler: Callable to remove (same object passed to
+                :meth:`subscribe`).
 
         Returns:
             True if the handler was found and removed, False otherwise.

src/cleveragents/infrastructure/events/reactive.py

@@ -173,7 +173,8 @@ class ReactiveEventBus:
 
         Args:
             event_type: The :class:`EventType` to stop listening for.
-            handler: The callable to remove (must be the same object passed to subscribe).
+            handler: Callable to remove (same object passed to
+                :meth:`subscribe`).
 
         Returns:
             True if the handler was found and removed, False otherwise.