The empty-records branch of `main()` returned without calling
`process.exit(0)`, leaving the Drizzle Postgres connection pool
holding the event loop open. The `migrate-auth-secret` process
then hangs indefinitely after printing "No 2FA records found,
nothing to migrate." causing the upstream `0.29.3.sh` security
migration script (which calls this via `docker exec`) to never
reach its final `docker service update` step that mounts the new
Docker Secret. Operators end up with the new secret created but
the dokploy service still configured with the hardcoded
`BETTER_AUTH_SECRET`, while believing the migration completed.
Match the success branch a few lines below which already does
`process.exit(0)`, and the pattern used in sibling scripts
`reset-password.ts` and `reset-2fa.ts`.
Closes#4392
