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/alembic.ini

@@ -0,0 +1,24 @@
+[alembic]
+script_location = migrations
+prepend_sys_path = .
+
+[loggers]
+keys = root
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+
+[handler_console]
+class = logging.StreamHandler
+args = (sys.stderr,)
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s