Bernardo Magri
787daf00dd
Add a private provider-neutral SQLite WAL cache with transactional migrations, retained raw payloads and tombstones, per-window opaque checkpoints, and reserved outbox/conflict tables. Verify migrations, permissions, identity invariants, concurrent access, atomic pull-page rollback, and future-schema rejection with deterministic tests. No OAuth, networking, secrets, or Graph synchronization is included yet.