properly closing event loops in client and server

src/pydase/client/client.py

@@ -33,7 +33,10 @@ class NotifyDict(TypedDict):
 
 def asyncio_loop_thread(loop: asyncio.AbstractEventLoop) -> None:
     asyncio.set_event_loop(loop)
-    loop.run_forever()
+    try:
+        loop.run_forever()
+    finally:
+        loop.close()
 
 
 class Client:

src/pydase/server/server.py

@@ -182,7 +182,10 @@ class Server:
 
         This method should be called to start the server after it's been instantiated.
         """
-        self._loop.run_until_complete(self.serve())
+        try:
+            self._loop.run_until_complete(self.serve())
+        finally:
+            self._loop.close()
 
     async def serve(self) -> None:
         process_id = os.getpid()