feat: add tenant-scoped rule and permission management

fastapi_modules/fastapi_leaudit/govdoc_bridge/runner.py

@@ -263,7 +263,7 @@ class GovdocRunner:
                 await session.execute(
                     text(
                         """
-                        SELECT COALESCE(region, 'default') AS region
+                        SELECT COALESCE(NULLIF(region, ''), '公共') AS region
                         FROM leaudit_documents
                         WHERE id = :document_id
                         LIMIT 1
@@ -272,7 +272,7 @@ class GovdocRunner:
                     {"document_id": DocumentId},
                 )
             ).mappings().first()
-        return str(row["region"] or "default") if row else "default"
+        return str(row["region"] or "公共") if row else "公共"
 
     def _BuildArtifactRow(
         self,