fix: restore get_supabase_client for other routers to fix RUNTIME_ERROR

db/supabase_client.py

@@ -1,5 +1,6 @@
 import os
 import httpx
+from supabase import create_client, Client
 from dotenv import load_dotenv
 
 load_dotenv()
@@ -26,3 +27,12 @@ def supabase_rest_call(method: str, endpoint: str, json_data: dict = None) -> li
         response.raise_for_status()
         return response.json()
 
+_client: Client | None = None
+
+def get_supabase_client() -> Client:
+    """Return a cached Supabase client using the service role key."""
+    global _client
+    if _client is None:
+        _client = create_client(SUPABASE_URL, SUPABASE_SERVICE_KEY)
+    return _client
+