docs: add sub-project service docs + sync vault 2026-06-08

Add 10 - Services/ docs for all sub-projects: backend, frontend, scanner,
deployment (new), update amanat-assist. Update Scanner Architecture,
Telegram Mini App flow, and Activity Log. Add payment safety edge cases.

10 - Services/README.md

@@ -0,0 +1,53 @@
+# 10 - Services
+
+This section documents each deployable service (sub-project) in the Amanat/Escrow platform. Each article covers the service's purpose, configuration, build process, and operational notes.
+
+See also: [[01 - Architecture]] · [[08 - Operations]] · [[03 - API Reference]]
+
+---
+
+## Service Inventory
+
+| Service | Language / Framework | Status | URL | Doc |
+|---|---|---|---|---|
+| Backend | Node.js / TypeScript (Express) | Live | `api.dev.amn.gg` | [[backend]] |
+| Frontend | Next.js / React / TypeScript | Live | `dev.amn.gg` | [[frontend]] |
+| Scanner | Go | Live | internal | [[scanner]] |
+| Amanat Assist | Node.js / TypeScript + LLM proxy | Live | `assist.dev.amn.gg` | [[amanat-assist]] |
+| Deployment | Docker Compose + Caddy + Watchtower | Live | — | [[deployment]] |
+
+---
+
+## Architecture Overview
+
+```
+Browser / Telegram Mini App
+        │
+        ▼
+  infra-caddy (reverse proxy, TLS)
+  ├── dev.amn.gg          → [[frontend]]   (Next.js SSR)
+  ├── api.dev.amn.gg      → [[backend]]    (Express REST + WebSocket)
+  └── assist.dev.amn.gg   → [[amanat-assist]] (LLM proxy / Telegram bot)
+
+[[backend]]
+  ├── MongoDB / PostgreSQL  (dual-write seam, PG cutover in progress)
+  ├── Redis                 (sessions, rate-limit, pub-sub)
+  └── emits payment events
+        │
+        ▼
+  [[scanner]]  (Go — watches EVM chains for on-chain payments)
+        │  webhook callback
+        └──────────────────▶ [[backend]] /api/payment/callback
+```
+
+- All containers share the `shared-web` Docker network managed by [[deployment]].
+- [[amanat-assist]] is a separate Telegram Mini App; it calls [[backend]] APIs on behalf of users.
+- [[scanner]] is stateless; it probes RPC endpoints and forwards confirmations to the backend.
+
+---
+
+## Related Sections
+
+- [[01 - Architecture]] — system-wide design decisions, data model, and sequence diagrams
+- [[03 - API Reference]] — REST endpoints, WebSocket events, auth headers
+- [[08 - Operations]] — deployment runbooks, monitoring, secrets management