feat: support off-shelf location registration

app/main.py

@@ -18,7 +18,7 @@ except Exception as e:
 
 from app.api.v1.location import router as location_router
 from app.api.v1.box import router as box_router
-from app.services.location_service import DuplicateLocationError
+from app.services.location_service import AlreadyOffShelfError, DuplicateLocationError
 from app.services.box_service import (
     BoxItemNotFoundError,
     DuplicateBoxItemError,
@@ -47,6 +47,19 @@ async def duplicate_location_handler(request: Request, exc: DuplicateLocationErr
     )
 
 
+@app.exception_handler(AlreadyOffShelfError)
+async def already_off_shelf_handler(request: Request, exc: AlreadyOffShelfError):
+    return JSONResponse(
+        status_code=409,
+        content={
+            "error_code": "ALREADY_OFF_SHELF",
+            "message": "该总排号已下架至转运区域，不可重新上架",
+            "location_code": exc.location_code,
+            "registered_at": exc.registered_at,
+        },
+    )
+
+
 @app.exception_handler(RequestValidationError)
 async def validation_error_handler(request: Request, exc: RequestValidationError):
     for err in exc.errors():