fix(lint): use plain comments for architecture validator codes

Replace # noqa: SVC-006 with # SVC-006 to avoid ruff warnings about
unknown codes. Updated architecture validators to match the new format
by checking for the code string directly instead of the noqa: prefix.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/inventory/services/inventory_service.py

@@ -754,7 +754,7 @@ class InventoryService:
         self, db: Session
     ) -> AdminStoresWithInventoryResponse:
         """Get list of stores that have inventory entries (admin only)."""
-        # noqa: SVC-005 - Admin function, intentionally cross-store
+        # SVC-005 - Admin function, intentionally cross-store
         # Use subquery to avoid DISTINCT on JSON columns (PostgreSQL can't compare JSON)
         store_ids_subquery = (
             db.query(Inventory.store_id)