Initial MVP: local visual novel library with Ren'Py → PGVN converter

- FastAPI backend: admin bootstrap with forced credential change, admin-created
  users with one-time generated passwords, roles as permission sets
- Games and versions with content-addressed blob storage; forks copy only the
  manifest, so mods share assets with the original
- Worker: archive/RPA extraction, unrpyc for .rpyc, own .rpy parser, Python
  subset translated via ast, media converted to WebP/Opus/WebM
- React panel (library search, game page, upload, users, roles) and a
  framework-free web player with saves, history, skip/auto, transitions
- docker compose: postgres, backend, worker, nginx on a single HTTP port

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/migrations/env.py

@@ -0,0 +1,26 @@
+import asyncio
+
+from alembic import context
+from sqlalchemy.ext.asyncio import create_async_engine
+
+from app import models  # noqa: F401  (registers tables)
+from app.config import get_settings
+from app.db import Base
+
+target_metadata = Base.metadata
+
+
+def run(connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def main() -> None:
+    engine = create_async_engine(get_settings().database_url)
+    async with engine.connect() as conn:
+        await conn.run_sync(run)
+    await engine.dispose()
+
+
+asyncio.run(main())