Remove migration files not needed for fresh installs

README.zh-CN.md

@@ -305,7 +305,7 @@ Copyright © 2026 [Stardream](https://git.stdm.moe/Stardream)。本项目采用
 
 <!-- LINK GROUP -->
 [back-to-top]: https://img.shields.io/badge/-BACK_TO_TOP-black?style=flat-square
-[license-shield]: https://img.shields.io/badge/license-AGPL--3.0-white?labelColor=black&style=flat-square
+[license-shield]: https://img.shields.io/badge/许可证-AGPL--3.0-white?labelColor=black&style=flat-square
 [license-link]: ./LICENSE
 [python-shield]: https://img.shields.io/badge/python-3.12-blue?labelColor=black&logo=python&logoColor=white&style=flat-square
 [python-link]: https://www.python.org/

backend/alembic/versions/a1b2c3d4e5f6_convert_status_to_varchar.py

@@ -1,25 +0,0 @@
-"""convert_status_to_varchar
-
-Revision ID: a1b2c3d4e5f6
-Revises: 86cca6d7adcb
-Create Date: 2026-06-02 12:00:00.000000
-
-"""
-from typing import Sequence, Union
-
-from alembic import op
-
-revision: str = 'a1b2c3d4e5f6'
-down_revision: Union[str, None] = '86cca6d7adcb'
-branch_labels: Union[str, Sequence[str], None] = None
-depends_on: Union[str, Sequence[str], None] = None
-
-
-def upgrade() -> None:
-    op.execute("ALTER TABLE lotteries ALTER COLUMN status TYPE VARCHAR(20) USING status::text")
-    op.execute("DROP TYPE IF EXISTS lotterystatus")
-
-
-def downgrade() -> None:
-    op.execute("CREATE TYPE lotterystatus AS ENUM ('draft', 'active', 'drawing', 'finished', 'cancelled')")
-    op.execute("ALTER TABLE lotteries ALTER COLUMN status TYPE lotterystatus USING status::lotterystatus")