Added a new task markdown file `2026-0824.01.jul.feat.webauthn.prf-extension-1200.md` detailing the plan for integrating the WebAuthn PRF extension. It outlines the schema updates, client and server flow implementations, and progressive fallback logic as per Kanban guidelines.
Co-authored-by: mrteye <1945243+mrteye@users.noreply.github.com>
