PostgreSQL operations

PostgreSQL adapters provide durable repositories for collective runtime, membership, synchronization, audit and checkpoint state. Run migrations as a versioned deployment step and preserve the migration revision with campaign evidence.

Operational requirements include:

• a dedicated database and least-privilege application role;
• encrypted transport and storage;
• backups tested against the checkpoint and evidence retention policy;
• connection limits sized for peer and worker concurrency;
• migration locking and rollback procedures;
• observability for outbox lag, delivery receipts and recovery checkpoints.

Persistence improves continuity; it does not make an unsafe authority state valid. Revalidate membership, leases and fences after restore.