feat(beatmap,score): update beatmaps from Bancho & deleting scores (#50)

New API:

- DELETE /api/private/score/{score_id}: delete a score
- POST /api/private/beatmapsets/{beatmapset_id}/sync: request for syncing a beatmapset

New configuration:

- OLD_SCORE_PROCESSING_MODE

app/database/beatmap_sync.py

@@ -0,0 +1,23 @@
+from datetime import datetime
+from typing import TypedDict
+
+from app.models.beatmap import BeatmapRankStatus
+from app.utils import utcnow
+
+from sqlmodel import JSON, Column, DateTime, Field, SQLModel
+
+
+class SavedBeatmapMeta(TypedDict):
+    beatmap_id: int
+    md5: str
+    is_deleted: bool
+    beatmap_status: BeatmapRankStatus
+
+
+class BeatmapSync(SQLModel, table=True):
+    beatmapset_id: int = Field(primary_key=True, foreign_key="beatmapsets.id")
+    beatmaps: list[SavedBeatmapMeta] = Field(sa_column=Column(JSON))
+    beatmap_status: BeatmapRankStatus = Field(index=True)
+    consecutive_no_change: int = Field(default=0)
+    next_sync_time: datetime = Field(default_factory=utcnow, sa_column=Column(DateTime, index=True))
+    updated_at: datetime = Field(default_factory=utcnow, sa_column=Column(DateTime, index=True))