feat: add POST /CargoTrace/location endpoint

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

app/main.py

@@ -1,7 +1,29 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
+from fastapi.responses import JSONResponse
+
+from app.api.v1.location import router as location_router
 
 app = FastAPI(title="CargoTrace API", version="0.1.0")
 
+app.include_router(location_router, prefix="/CargoTrace")
+
+
+@app.exception_handler(ValueError)
+async def value_error_handler(request: Request, exc: ValueError):
+    error_code = str(exc)
+    status_map = {
+        "INVALID_ZONGPAI": 400,
+        "INVALID_LOCATION": 400,
+    }
+    status = status_map.get(error_code, 400)
+    return JSONResponse(
+        status_code=status,
+        content={
+            "error_code": error_code,
+            "message": str(exc),
+        },
+    )
+
 
 @app.get("/")
 async def root():