docs: create deployment architecture diagram

## Description
Create comprehensive diagrams showing Fleet deployment topology.

## Requirements
- [ ] L1 (PicoClaw/MicroClaw) -> L2 (NanoClaw) -> L3 (MoltClaw/Fleet) data flow
- [ ] Network topology (LAN, 4G, LoRa options)
- [ ] Component interaction sequence diagram
- [ ] Failure scenarios and fallback paths

## Skills
Markdown, Mermaid diagrams, distributed systems