Refactor exception handling and formatting in oauth2_auth.py

Simplified exception raising in _fetch_oidc_discovery by consolidating RuntimeError messages into single lines. Improved code readability by reformatting function calls to follow consistent indentation.

Author: loveyana

veadk/auth/middleware/oauth2_auth.py

@@ -123,6 +123,7 @@ def _get_identity_client() -> "IdentityClient":
             "Ensure the veadk package is properly installed."
         ) from e
 
+
 __all__ = [
     # Configuration classes
     "OAuth2Config",
@@ -221,13 +222,9 @@ def _fetch_oidc_discovery(
             f"OIDC discovery failed: HTTP {e.response.status_code} from {discovery_url}"
         ) from e
     except httpx.RequestError as e:
-        raise RuntimeError(
-            f"OIDC discovery failed: {e} for {discovery_url}"
-        ) from e
+        raise RuntimeError(f"OIDC discovery failed: {e} for {discovery_url}") from e
     except Exception as e:
-        raise RuntimeError(
-            f"OIDC discovery failed: {e}"
-        ) from e
+        raise RuntimeError(f"OIDC discovery failed: {e}") from e
 
 
 class OAuth2Config(BaseModel):
@@ -383,7 +380,9 @@ def from_veidentity(
             identity_client = _get_identity_client()
 
         # Step 1: Get or create user pool
-        user_pool = identity_client.get_user_pool(name=user_pool_name, uid=user_pool_uid)
+        user_pool = identity_client.get_user_pool(
+            name=user_pool_name, uid=user_pool_uid
+        )
         if user_pool:
             user_pool_id, user_pool_domain = user_pool
             logger.info(