refactor(api): use Annotated-style dependency injection

app/router/fetcher.py

@@ -1,14 +1,13 @@
 from __future__ import annotations
 
-from app.dependencies.fetcher import get_fetcher
-from app.fetcher import Fetcher
+from app.dependencies.fetcher import Fetcher
 
-from fastapi import APIRouter, Depends
+from fastapi import APIRouter
 
 fetcher_router = APIRouter(prefix="/fetcher", include_in_schema=False)
 
 
 @fetcher_router.get("/callback")
-async def callback(code: str, fetcher: Fetcher = Depends(get_fetcher)):
+async def callback(code: str, fetcher: Fetcher):
     await fetcher.grant_access_token(code)
     return {"message": "Login successful"}