# `mgf-alembic` — structured-event catalogue (LG-15)

Every structured log record carrying an `event` field is registered here; an
unregistered `event` is a defect (LG-15).

| `event` | Level | Where | Meaning |
|---|---|---|---|
| `mgf.alembic.drift_detected` | WARNING | `_drift.py` | `detect_drift` found schema drift between the models and the live DB (the `DriftReport` is non-clean). |
| `mgf.alembic.migration_run` | INFO (audit) | `_env.py` | An online migration run is starting (schema-changing action; carries audit=true). |
| `mgf.alembic.migration_complete` | INFO | `_env.py` | An online migration run finished. |
