Adds pytest suite proving server-side tamper/replay guarantees:
stale-version updates and deletes are refused (409), duplicate uuids
are rejected, and post-delete resurrection scenarios are documented.
Combined with the client-side AEAD binding of uuid+salt any server-side
manipulation surfaces as an undecryptable row in the UI. 3/3 passing.
🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>
