perf(clear_events): fix Ruff PERF203 by moving try/except outside the loop

- Replace per-iteration try/except with a single try/except around a while True loop
- Exit on asyncio.QueueEmpty to stop draining when the queue is empty
- Reduces exception overhead and satisfies Ruff PERF203 without changing behavior

Author: meoow113

.idea/.gitignore

@@ -13,6 +13,7 @@ dependencies = [
   "pydantic>=2.11.3",
   "protobuf>=5.29.5",
   "google-api-core>=1.26.0",
+  "pre-commit>=4.3.0",
 ]
 
 classifiers = [

.idea/a2a-python.iml

@@ -184,16 +184,16 @@ async def clear_events(self, clear_child_queues: bool = True) -> None:
         # Clear all events from the queue, even if closed
         cleared_count = 0
         async with self._lock:
-            while not self.queue.empty():
-                try:
+            try:
+                while True:
                     event = self.queue.get_nowait()
                     logger.debug(
                         f'Discarding unprocessed event of type: {type(event)}, content: {event}'
                     )
                     self.queue.task_done()
                     cleared_count += 1
-                except asyncio.QueueEmpty:
-                    break
+            except asyncio.QueueEmpty:
+                pass
 
             if cleared_count > 0:
                 logger.debug(