feat: add Ollama proxy timeouts, SSH key migration, polish skills, and demo content

- Update all skill SSH commands from sshpass to key-based auth (~/.ssh/archipelago-deploy)
- Add proxy_connect_timeout 120s to nginx Ollama location blocks
- Add new polish/sweep skills for overnight automation
- Add demo content (documents, photos) for demo stack
- Add .ssh/ to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

demo/content/documents/node-setup-checklist.md

@@ -0,0 +1,31 @@
+# Archipelago Node Setup Checklist
+
+## Hardware
+- [x] Intel NUC / Mini PC (16GB RAM minimum)
+- [x] 2TB NVMe SSD (for Bitcoin blockchain)
+- [x] USB drive for Archipelago installer
+- [x] Ethernet cable (recommended over WiFi)
+
+## Initial Setup
+- [x] Flash Archipelago ISO to USB
+- [x] Boot from USB, follow installer
+- [x] Set admin password
+- [x] Connect to local network
+
+## Core Apps
+- [x] Bitcoin Knots - Full node validation
+- [x] LND - Lightning Network
+- [x] Mempool Explorer - Block/tx visualizer
+- [ ] BTCPay Server - Payment processing
+- [ ] Fedimint - Federated mint
+
+## Security
+- [x] Enable 2FA (TOTP)
+- [x] Set up Tor hidden services
+- [ ] Configure Tailscale VPN for remote access
+- [ ] Back up node identity (DID)
+
+## Monitoring
+- [ ] Set up Grafana dashboards
+- [ ] Configure Uptime Kuma alerts
+- [ ] Review system logs weekly