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

migrations/versions/2025-10-01_b1ac2154bd0d_sync_add_updated_at.py

@@ -0,0 +1,35 @@
+"""sync: add updated_at
+
+Revision ID: b1ac2154bd0d
+Revises: 2885978490dc
+Create Date: 2025-10-01 14:56:08.539694
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+
+# revision identifiers, used by Alembic.
+revision: str = "b1ac2154bd0d"
+down_revision: str | Sequence[str] | None = "2885978490dc"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    op.add_column("beatmapsync", sa.Column("updated_at", sa.DateTime(), nullable=True))
+    op.execute(sqlmodel.text("UPDATE beatmapsync SET updated_at = NOW() WHERE updated_at IS NULL"))
+    op.alter_column("beatmapsync", "updated_at", nullable=False, type_=sa.DateTime())
+    op.create_index(op.f("ix_beatmapsync_updated_at"), "beatmapsync", ["updated_at"], unique=False)
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    op.drop_index(op.f("ix_beatmapsync_updated_at"), table_name="beatmapsync")
+    op.drop_column("beatmapsync", "updated_at")