refactor: region from document, not app config

- Add region column to leaudit_documents + LeauditDocument model
- AuditServiceImpl: read region from document.region, not APP_REGION
- RuleServiceImpl: ListBindings/CreateBinding accept Region parameter
- RuleBindingCreateDTO: add region field
- RuleController: pass region from query param/DTO to service
- APP_REGION removed from binding queries; region flows from document

Region is now per-document: each document carries its region at upload
time, and rules are matched to the document's region at run time.

fastapi_modules/fastapi_leaudit/services/impl/auditServiceImpl.py

@@ -6,7 +6,6 @@
 
 from datetime import datetime
 
-from fastapi_admin.config import APP_REGION
 from fastapi_common.fastapi_common_logger import logger
 from fastapi_common.fastapi_common_sqlalchemy.database import GetAsyncSession
 from fastapi_common.fastapi_common_web.domain.responses import StatusCodeEnum
@@ -78,7 +77,7 @@ class AuditServiceImpl(IAuditService):
                     LIMIT 1
                     """
                 ),
-                {"doc_type_id": document.typeId, "region": APP_REGION},
+                {"doc_type_id": document.typeId, "region": document.region},
             )
             binding = bindingResult.mappings().first()
             if not binding or not binding["rule_set_id"] or not binding["rule_version_id"]: