fix(beatmap): make max_combo nullable

app/database/beatmap.py

@@ -36,7 +36,7 @@ class BeatmapBase(SQLModel):
     # optional
     checksum: str = Field(sa_column=Column(VARCHAR(32), index=True))
     current_user_playcount: int = Field(default=0)
-    max_combo: int = Field(default=0)
+    max_combo: int | None = Field(default=0)
     # TODO: failtimes, owners
 
     # BeatmapExtended

migrations/versions/ce29ef0a5674_beatmap_make_max_combo_nullable.py

@@ -0,0 +1,38 @@
+"""beatmap: make max_combo nullable
+
+Revision ID: ce29ef0a5674
+Revises: 9aa4f7c06824
+Create Date: 2025-08-13 15:38:59.797780
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = "ce29ef0a5674"
+down_revision: str | Sequence[str] | None = "9aa4f7c06824"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "beatmaps", "max_combo", existing_type=mysql.INTEGER(), nullable=True
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column(
+        "beatmaps", "max_combo", existing_type=mysql.INTEGER(), nullable=False
+    )
+    # ### end Alembic commands ###