feat: complete backend B1-B7 — Payload CMS, ezy payments, leads, deploy
- B1: Next.js 15 + Payload CMS 3.0 + Postgres 16, ESLint, Prettier, Husky, Vitest
- B2: 9 collections, 6 globals, 12 Page Builder blocks, access control, slugify/revalidate hooks
- B3: ezy.com.ua payments, Binotel HMAC webhook, leads API, Telegram bot, Resend email, rate limiting
- B4: Tariffs collection with ezy API sync (cron + manual), dynamic pricing source-of-truth
- B5: 13 test files covering unit libs and all API routes
- B6: Dockerfile multi-stage, docker-compose.prod.yml, nginx.conf SSL, GitHub Actions CI/CD, health endpoint
- B7: docs/admin-guide-ua.md (marketer guide), docs/deploy.md (VPS instructions), README quickstart
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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