feat: add WebSocket connection manager for real-time match events

Author: SherwynNg

services/matching-service/app/services/websocket_manager.py

@@ -0,0 +1,23 @@
+from typing import Dict
+from fastapi import WebSocket
+
+class ConnectionManager:
+    def __init__(self):
+        self.active_connections: Dict[str, WebSocket] = {}
+
+    async def connect(self, user_id: str, websocket: WebSocket):
+        await websocket.accept()
+        self.active_connections[user_id] = websocket
+
+    def disconnect(self, user_id: str):
+        self.active_connections.pop(user_id, None)
+
+    async def send_event(self, user_id: str, event: str, data: dict):
+        websocket = self.active_connections.get(user_id)
+        if websocket:
+            await websocket.send_json({
+                "event": event,
+                "data": data
+            })
+
+manager = ConnectionManager()