feat: accounting integration (D27), SMS relay driver (D26), rebuild user apps
- Add Tahesab/Zarrin accounting sync module with admin panel UI
- Add SMS relay driver as default provider, refactor SMS into driver pattern
- Update customer services, orders, products, and catalog queries
- Rebuild user-app and user-app-v2 dist assets
- Add Prisma migration for accounting tables
- Update docker-compose and env examples
- Update parity docs (DECISIONS, ISSUES, PROGRESS)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
