[sfloess]

Summary

• Add an initial PostgreSQL-backed REST service with health/readiness endpoints.
• Expose direct record retrieval and paginated enumeration/export independently of lexical search.
• Preserve stored content, metadata, provenance, scope, revision, and timestamps.
• Add project-bound bearer-token configuration, global-scope administrative writes, idempotency keys, structured errors, and project isolation.
• Add PostgreSQL-backed REST contract tests and setup documentation.

Deliberate scope

• No messaging or event publication.
• No model calls, generated summaries, chunks, or vectors. This service exposes only representations actually persisted.
• Export is paginated but does not yet provide a cross-page immutable snapshot.

Validation

The integration tests require a disposable PostgreSQL database configured through MEMORY_TEST_DATABASE_URL. They have been added but have not been run in this environment. Please run the documented tests and review the transaction/idempotency behavior before merging.