fix API 404 response to return exception detail, add WebSocket RF alias

tests/robot/resources/websocket_keywords.py

@@ -25,6 +25,10 @@ class WebSocketKeywords:
         asyncio.run(self._async_connect(ws_url))
         return f"Connected to {ws_url}"
 
+    def Connect_To_WebSocket(self, ws_url: str) -> str:
+        """Robot Framework alias for connect_to_websocket."""
+        return self.connect_to_websocket(ws_url)
+
     async def _async_connect(self, ws_url: str) -> None:
         self._connection = await websockets.connect(ws_url)
         logger.info(f"WebSocket connected: {self._connection}")