feat(beatmap): implement get beatmap arrtibutes

app/fetcher/beatmap.py

@@ -1,14 +1,19 @@
 from __future__ import annotations
 
-from app.database.beatmap import BeatmapResp
+from typing import TYPE_CHECKING
 
 from ._base import BaseFetcher
 
 from httpx import AsyncClient
 
+if TYPE_CHECKING:
+    from app.database.beatmap import BeatmapResp
+
 
 class BeatmapFetcher(BaseFetcher):
-    async def get_beatmap(self, beatmap_id: int) -> BeatmapResp:
+    async def get_beatmap(self, beatmap_id: int) -> "BeatmapResp":
+        from app.database.beatmap import BeatmapResp
+
         async with AsyncClient() as client:
             response = await client.get(
                 f"https://osu.ppy.sh/api/v2/beatmaps/{beatmap_id}",