Fixed error on trying to send ws message to disconnected client

This could result in a major filament usage track failure since the Use http request would fail and Moonraker would keep retrying to save the used filament. However it was actually saved since the db.commit() happens before the websocket message fails.

spoolman/ws.py

@@ -3,6 +3,7 @@
 import logging
 
 from fastapi import WebSocket
+from starlette.websockets import WebSocketState
 
 from spoolman.api.v1.models import Event
 
@@ -46,7 +47,22 @@ class SubscriptionTree:
         """Send a message to all websockets in this branch of the tree."""
         # Broadcast to all subscribers on this level
         for websocket in self.subscribers:
-            await websocket.send_text(evt.json())
+            if (
+                websocket.client_state == WebSocketState.DISCONNECTED  # noqa: PLR1714
+                or websocket.application_state == WebSocketState.DISCONNECTED
+            ):
+                # A bad disconnection may have occurred
+                self.remove(path, websocket)
+                logger.info(
+                    "Forcing disconnection of client %s on pool %s",
+                    websocket.client.host if websocket.client else "?",
+                    ",".join(path),
+                )
+            elif (
+                websocket.client_state == WebSocketState.CONNECTED
+                and websocket.application_state == WebSocketState.CONNECTED
+            ):
+                await websocket.send_text(evt.json())
 
         # Send the message further down the tree
         if len(path) > 0 and path[0] in self.children: