Triggers on:
- Push to main when crates/mem-store/migrations/*.sql changes
- Manual workflow_dispatch (runs ALL migrations)
On push: detects changed migration files, runs only those.
On dispatch: runs all migrations in order (idempotent).
Requires DB_USER + DB_PASSWORD secrets in Forgejo.
Connects to memory-db-rw.poimen.svc.cluster.local.
All migrations use IF NOT EXISTS / IF EXISTS guards.
