feat(location): add paicha overview endpoint

app/main.py

@@ -18,7 +18,11 @@ 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 AlreadyOffShelfError, DuplicateLocationError
+from app.services.location_service import (
+    AlreadyOffShelfError,
+    DuplicateLocationError,
+    PaichaNotFoundError,
+)
 from app.services.box_service import (
     BoxItemNotFoundError,
     DuplicateBoxItemError,
@@ -137,6 +141,17 @@ async def box_item_not_found_handler(request: Request, exc: BoxItemNotFoundError
     )
 
 
+@app.exception_handler(PaichaNotFoundError)
+async def paicha_not_found_handler(request: Request, exc: PaichaNotFoundError):
+    return JSONResponse(
+        status_code=404,
+        content={
+            "error_code": "PAICHA_NOT_FOUND",
+            "message": "暂无排产信息",
+        },
+    )
+
+
 @app.exception_handler(InvalidQuantityError)
 async def invalid_quantity_handler(request: Request, exc: InvalidQuantityError):
     return JSONResponse(