Implement per-account brute-force protection using a Redis-backed
failed-login counter. After 5 failed attempts within 15 minutes, the
account is temporarily locked out and all login attempts (including
with the correct password) are rejected with a 429 response.
Closes#11397
AI-assisted-by: longcat-2.0
Logout only cleared the auth-token cookie but never deleted the
server-side row because delete-fn read ::id which wrap-authz no longer
sets since 363b4e3778. Make delete-fn delete via ::session/:id attached
by wrap-authz so replayed tokens are rejected (CWE-613, GHSA-mj9f-5cwq-7p3q).
Add regression tests covering invalidation, idempotency and isolation
of other sessions. Fix verified with Red→Green TDD and full backend
suite (677 tests).
Closes#11316
AI-assisted-by: muse-spark-1.2-contributor
