fix: consume_all doesn't catch asyncio.TimeoutError in python 3.10 (#216)

Starting from 3.11,  `asyncio.TimeoutError` is a built-in alias
https://docs.python.org/3.11/library/asyncio-exceptions.html

Author: dongruixiao

src/a2a/server/events/event_consumer.py

@@ -130,6 +130,9 @@ async def consume_all(self) -> AsyncGenerator[Event]:
             except TimeoutError:
                 # continue polling until there is a final event
                 continue
+            except asyncio.TimeoutError:
+                # This class was made an alias of build-in TimeoutError after 3.11
+                continue
             except QueueClosed:
                 # Confirm that the queue is closed, e.g. we aren't on
                 # python 3.12 and get a queue empty error on an open queue