Summary

• add a durable storage readiness standard for local, self-hosted, cloud, provider-live, finance, and production readiness claims
• cover source-of-truth declarations, Postgres migrations/drift, RLS or equivalent boundaries, backup/restore, retention/delete/tombstones, conflict handling, TLS/credential posture, and evidence bundles
• link the standard from the @hasna/contracts README

Validation

• bun install --frozen-lockfile
• bun run typecheck
• bun test
• bun run build
• marker scan for patch markers
• checklist term scan for storage readiness requirements
• staged secrets scan: todos redaction scan --file /tmp/open-contracts-storage-standard-staged.diff

Task: 5b91c3fe-f488-4b93-949c-aaa333459d43