docs: sync documentation with latest codebase state

- Update Activity Log with 108 missing commits (48 backend + 60 frontend)
- Update version references: backend v2.8.79, frontend v2.8.94
- Update migration count: 18 migrations (0000-0017)
- Update Telegram Mini App Flow to v2.8.94
- Update Payment Flow - Scanner to 2026-06-05
- Update all architectural and database references

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

07 - Development/Environment Variables.md

@@ -235,7 +235,7 @@ Direct-address balance checks and watches currently support EVM ERC-20 only. Bac
 | `TRUST_PROXY` | backend | optional | auto-on in prod | `true` | Enables `app.set('trust proxy', 1)` for Nginx |
 | `NEXT_PUBLIC_APP_URL` | frontend | ✅ | — | `http://localhost:8083` | Self-URL used in metadata + OG tags |
 | `NEXT_PUBLIC_APP_NAME` | frontend | optional | `AMN` | `ایسکرو آنلاین` | Display name in nav / titles |
-| `NEXT_PUBLIC_APP_VERSION` | frontend | optional | `package.json` | `1.0.2` | Shown in the version logger |
+| `NEXT_PUBLIC_APP_VERSION` | frontend | optional | `package.json` | `2.8.94` | Shown in the version logger |
 | `NEXT_PUBLIC_API_URL` | frontend | ✅ | — | `http://localhost:5001/api` | Axios base URL |
 | `NEXT_PUBLIC_API_BASE_URL` | frontend | optional | derived | `http://localhost:5001` | Used by a few legacy callers |
 | `NEXT_PUBLIC_BACKEND_URL` | frontend | ✅ | — | `http://localhost:5001` | Used by file URL builders |