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>

04 - Flows/Telegram Mini App.md

@@ -8,7 +8,7 @@ task: "5.4"
 
 > **Last updated:** 2026-06-03
 > **Status:** IN PROGRESS — Task 5.4 (dependencies: 5.1 auth infra, 5.2 Telegram sign-in endpoint)
-> **Frontend branch:** `integrate-main-into-development` · v2.8.59
+> **Frontend branch:** `integrate-main-into-development` · v2.8.94
 > **Entry point:** `src/sections/telegram/` · route `/telegram`
 
 # Telegram Mini App Flow
@@ -546,7 +546,7 @@ src/
 
 ---
 
-## 15. Current Implementation Status (v2.8.59)
+## 15. Current Implementation Status (v2.8.94)
 
 | Area | Status | Notes |
 |---|---|---|