제공자 키 저장 쿼리 충돌 수정

apps/api/app/services/provider_credentials.py

@@ -340,7 +340,7 @@ async def save_credential(
     async with pool.acquire() as conn:
         row = await conn.fetchrow(
             """
-            INSERT INTO app.admin_provider_credential (
+            INSERT INTO app.admin_provider_credential AS existing (
               provider, token_encrypted, token_hint, auth_kind, updated_by, updated_at,
               refresh_token_encrypted, extra
             )
@@ -351,8 +351,14 @@ async def save_credential(
               auth_kind = EXCLUDED.auth_kind,
               updated_by = EXCLUDED.updated_by,
               updated_at = now(),
-              refresh_token_encrypted = COALESCE(EXCLUDED.refresh_token_encrypted, refresh_token_encrypted),
-              extra = CASE WHEN EXCLUDED.extra::text = '{}'::jsonb THEN extra ELSE EXCLUDED.extra END,
+              refresh_token_encrypted = COALESCE(
+                EXCLUDED.refresh_token_encrypted,
+                existing.refresh_token_encrypted
+              ),
+              extra = CASE
+                WHEN EXCLUDED.extra = '{}'::jsonb THEN existing.extra
+                ELSE EXCLUDED.extra
+              END,
               last_verified_at = NULL,
               last_verify_ok = NULL,
               last_verify_error = NULL