[fix]. Recover legacy DB migration baseline

src/gitea_codex_bot/main.py

@@ -14,7 +14,7 @@ from starlette.exceptions import HTTPException as StarletteHTTPException
 from sqlalchemy.orm import Session
 
 from gitea_codex_bot.config import Settings, get_settings
-from gitea_codex_bot.db import Base, get_engine, get_session
+from gitea_codex_bot.db import get_session
 from gitea_codex_bot.services.commands import parse_command
 from gitea_codex_bot.services.gitea import GiteaClient
 from gitea_codex_bot.services.jobs import cooldown_remaining_seconds, enqueue_job, persist_webhook_event
@@ -123,7 +123,6 @@ async def lifespan(app: FastAPI):
     _validate_required_env(settings)
     _log_startup_identity(settings)
     _log_startup_auth_json_status(settings)
-    Base.metadata.create_all(bind=get_engine())
 
     stop_event = asyncio.Event()
     task = asyncio.create_task(worker_loop(settings, stop_event))