docs: add AI stack to README.md

Updated README.md with AI intelligence system:

**Core Systems Table**:
- Added AI system entry with ai.pivoine.art access point

**Infrastructure Section**:
- Added AI Intelligence Core with PostgreSQL 16 + pgvector
- Listed Open WebUI, Crawl4AI, and document embeddings

**Navigation Commands**:
- New AI Operations section with usage instructions
- How to configure Claude API in Open WebUI
- Steps: create account, add API connection, select model, upload docs
- Internal services documentation (Crawl4AI, PostgreSQL)
- n8n workflow integration examples

**Ship Architecture**:
- Added AI Intelligence category with 3 services
- PostgreSQL+pgvector for vector database
- Open WebUI for Claude interface
- Crawl4AI for web scraping (internal)

**Storage Volumes**:
- ai_postgres_data: AI vector database
- ai_webui_data: Open WebUI application data
- ai_crawl4ai_data: Web scraping cache

**Backup Protocol**:
- Updated backup window to 2-10 AM
- Updated count from 11 to 16 backup plans

All AI services accessible at https://ai.pivoine.art with Claude
integration, RAG support, and web search capabilities.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -57,6 +57,7 @@ The **Falcon** is a state-of-the-art containerized starship, powered by Docker's
 | **KIT** | *Toolkit hub with converter, editor & colors* | [kit.pivoine.art](https://kit.pivoine.art) |
 | **JELLY** | *Media streaming server* | [jelly.pivoine.art](https://jelly.pivoine.art) |
 | **DROP** | *Peer-to-peer file sharing* | [drop.pivoine.art](https://drop.pivoine.art) |
+| **AI** | *Claude AI with RAG & web scraping* | [ai.pivoine.art](https://ai.pivoine.art) |
 | **RESTIC** | *Automated backup vault system* | [restic.pivoine.art](https://restic.pivoine.art) |
 | **NETDATA** | *Real-time ship diagnostics & alerts* | [netdata.pivoine.art](https://netdata.pivoine.art) |
 | **PROXY** | *Shield control dashboard* | [proxy.pivoine.art](https://proxy.pivoine.art) |
@@ -78,7 +79,14 @@ The **Falcon** is a state-of-the-art containerized starship, powered by Docker's
 │  ├─ Umami Analytics Vault                      │
 │  ├─ n8n Workflow Engine Database               │
 │  ├─ Linkwarden Bookmark Archive                │
-│  └─ Joplin Note-taking Server Database         │
+│  ├─ Joplin Note-taking Server Database         │
+│  └─ Mattermost Team Chat Database              │
+├─────────────────────────────────────────────────┤
+│  🤖 AI INTELLIGENCE CORE (PostgreSQL 16)       │
+│  ├─ pgvector extension for RAG operations      │
+│  ├─ Open WebUI with Claude integration         │
+│  ├─ Crawl4AI web scraping service              │
+│  └─ Document embeddings & semantic search      │
 ├─────────────────────────────────────────────────┤
 │  ⚡ REDIS CACHE HYPERDRIVE                     │
 │  └─ Warp-speed data acceleration               │
@@ -235,6 +243,41 @@ arty env/sync
 # - Programmatic API access
 ```
 
+### AI Operations (AI System)
+
+```bash
+# Access Open WebUI with Claude integration
+# URL: https://ai.pivoine.art
+
+# Features:
+# - ChatGPT-like interface with Claude AI
+# - Upload documents for RAG (Retrieval-Augmented Generation)
+# - Web search for current information
+# - pgvector-powered semantic search
+# - Email notifications via SMTP
+# - n8n workflow integration
+
+# How to use:
+# 1. Visit https://ai.pivoine.art and create an account
+# 2. In Settings → Connections, add Claude API:
+#    - Name: Anthropic Claude
+#    - API Base URL: https://api.anthropic.com/v1
+#    - API Key: (your Anthropic API key)
+# 3. Select Claude model in chat (claude-3-5-sonnet-20241022)
+# 4. Upload documents in Knowledge → Files for RAG
+# 5. Start chatting with AI-enhanced responses
+
+# Internal services:
+# - Crawl4AI scraping API: http://ai_crawl4ai:11235 (container network)
+# - AI PostgreSQL with pgvector: ai_postgres:5432
+# - Database: openwebui (user: ai)
+
+# Integration with n8n:
+# - Create workflows that use Crawl4AI for web scraping
+# - Trigger AI tasks via webhooks
+# - Send results to Mattermost notifications
+```
+
 ### Backup Operations (RESTIC System)
 
 ```bash
@@ -292,9 +335,15 @@ THE FALCON (falcon_network)
 │  ├─ Kit Toolkit        [vert.kit.pivoine.art, paint.kit.pivoine.art, pastel.kit.pivoine.art]
 │  ├─ Jellyfin Media     [jelly.pivoine.art]
 │  ├─ PairDrop Sharing   [drop.pivoine.art]
+│  ├─ Open WebUI AI      [ai.pivoine.art]
 │  ├─ Backrest Backups   [restic.pivoine.art]
 │  └─ WireGuard VPN      [vpn.pivoine.art]
 │
+├─ 🤖 AI INTELLIGENCE
+│  ├─ PostgreSQL+pgvector [Internal] → Vector Database
+│  ├─ Open WebUI         [ai.pivoine.art] → Claude Interface
+│  └─ Crawl4AI           [Internal:11235] → Web Scraper
+│
 └─ 💾 STORAGE VOLUMES
    ├─ postgres_data      → Critical mission data
    ├─ directus_uploads   → Alien encounter evidence
@@ -309,6 +358,9 @@ THE FALCON (falcon_network)
    ├─ vaultwarden_data   → Encrypted password vault
    ├─ joplin_data        → Note-taking server data
    ├─ jelly_config       → Jellyfin media server config
+   ├─ ai_postgres_data   → AI vector database
+   ├─ ai_webui_data      → Open WebUI application data
+   ├─ ai_crawl4ai_data   → Web scraping cache
    ├─ backrest_data      → Backup system state
    ├─ backrest_config    → Backup configurations
    └─ letsencrypt_data   → Shield certificates
@@ -357,8 +409,8 @@ THE FALCON (falcon_network)
 └─ VPN cloaking device enabled
 
 💾 BACKUP PROTOCOL
-├─ Automated daily backups (2-8 AM)
-├─ 11 backup plans covering all volumes
+├─ Automated daily backups (2-10 AM)
+├─ 16 backup plans covering all volumes
 ├─ Retention: 7 daily, 4 weekly, 3-12 monthly
 ├─ Encrypted restic repositories
 ├─ Weekly maintenance (prune & integrity check)