[fix]. Recover legacy DB migration baseline

docker/entrypoint.sh

@@ -1,6 +1,36 @@
 #!/bin/sh
 set -eu
 
+echo "Checking migration baseline..."
+python - <<'PY'
+from sqlalchemy import create_engine, inspect, text
+
+from gitea_codex_bot.config import get_settings
+
+settings = get_settings()
+engine = create_engine(settings.database_url)
+
+with engine.connect() as conn:
+    inspector = inspect(conn)
+    tables = set(inspector.get_table_names())
+
+    has_alembic_version = "alembic_version" in tables
+    has_review_jobs = "review_jobs" in tables
+    has_webhook_events = "webhook_events" in tables
+
+    if not has_alembic_version and (has_review_jobs or has_webhook_events):
+        revision = "0001_initial"
+        if has_review_jobs:
+            columns = {c["name"] for c in inspector.get_columns("review_jobs")}
+            if "trigger_comment_body" in columns:
+                revision = "0002_trigger_comment_body"
+        conn.execute(text("CREATE TABLE IF NOT EXISTS alembic_version (version_num VARCHAR(32) NOT NULL, PRIMARY KEY (version_num))"))
+        conn.execute(text("DELETE FROM alembic_version"))
+        conn.execute(text("INSERT INTO alembic_version (version_num) VALUES (:revision)"), {"revision": revision})
+        conn.commit()
+        print(f"Stamped legacy database at revision {revision}")
+PY
+
 echo "Running database migrations..."
 alembic upgrade head
 

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))