v1.8.12026-04-01

Security audit fixes and CI pipeline repairs

Fix critical timing attack on admin auth, add Zod validation to vote endpoint, resolve CI failures across 4 workflows, and add accessibility linting.

Correction3

Fix timing attack vulnerability on admin stats endpoint using crypto.timingSafeEqual()
Add Zod schema validation to vote endpoint with input length limits
Fix 4 CI workflow failures: GDPR purge env loading, pnpm workspace config, picomatch ReDoS override, outdated E2E assertions

Amélioration2