Module migrate 

Schema migration runner — 4.0 → current chain.

Each step is atomic: BEGIN IMMEDIATE … COMMIT. Any failure rolls back the entire step and returns an error — no half-migrated state.

Functions

run_migrations

Run all pending migrations on db_path. Idempotent if already at target. Returns the list of migration steps executed.

target_version

The schema version this binary migrates to (single source of truth for callers that want to report it, e.g. the CLI migrate “nothing to do” message).