fix: check if loop is running in SocketIOHandler

Before emitting sio events in the SocketIOHandler, I have to check if
the loop is actually still running. This caused issues with pytest as
pytest was tearing down asyncio tasks and stopping the loop, while the
sio handler was still trying to send those logs to the sio clients.

src/pydase/utils/logging.py

@@ -165,6 +165,7 @@ class SocketIOHandler(logging.Handler):
         log_entry = self.format(record)
 
         loop = asyncio.get_event_loop()
+        if loop.is_running():
             loop.create_task(
                 self._sio.emit(
                     "log",