refactor(weather): add app_build method

weather/route/api.py

@@ -1,12 +1,13 @@
 import datetime
 
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 
-from weather.api import get_api
 from weather.model import WeatherResponse
 
 
 def mount(app: FastAPI):
     @app.get("/api/weather/{location}/{date}")
-    async def get_weather(location: str, date: datetime.date) -> WeatherResponse:
-        return await get_api().get_day(location, date)
+    async def get_weather_api(
+        request: Request, location: str, date: datetime.date
+    ) -> WeatherResponse:
+        return await request.app.state.weather_api.get_day(location, date)