Failsafe signalr_event_from_payload, create an unknown type event if no type provided.

Author: nlz242

pyhilo/signalr.py

@@ -58,7 +58,7 @@ def __post_init__(self) -> None:
 def signalr_event_from_payload(payload: dict[str, Any]) -> SignalREvent:
     """Create a SignalREvent object from a SignalR event payload."""
     return SignalREvent(
-        payload["type"],
+        payload.get("type", SignalRMsgType.UNKNOWN),
         payload.get("target", ""),
         payload.get("arguments", ""),
         payload.get("invocationId"),