Add persistent context files and cleanup stale references

- Add CONTEXT.md: Full infrastructure documentation with architecture diagram,
  routing table, network details, common operations, and important limitations
- Add CLAUDE.md: Project-level context for AI agents working in this codebase
- Add global-claude-md/CLAUDE.md: User-level global context for ~/.claude/
- Delete nginx-ai-proxy.conf: Unused, Caddy replaced nginx on big-server
- Update deploy.sh: Remove stale nginx setup step, update domain to ai.ein-softworks.com
- Update README.md: Remove nginx-ai-proxy.conf from files list, update domain,
  and remove leaked auth token from example

Context files provide persistent reference for AI coding sessions across
all projects and the ein-ai-proxy codebase specifically.

deploy.sh

@@ -81,32 +81,19 @@ else
     exit 1
 fi
 
-# --- Step 5: Nginx setup reminder ---
-echo "[5/5] Nginx setup:"
-echo ""
-echo "  1. Create DNS A record: ai.maybe.zone -> $(curl -s ifconfig.me 2>/dev/null || echo 'YOUR_IP')"
-echo ""
-echo "  2. Install the nginx config:"
-echo "     sudo cp $PROXY_DIR/nginx-ai-proxy.conf /etc/nginx/sites-available/ai-proxy"
-echo "     sudo ln -sf /etc/nginx/sites-available/ai-proxy /etc/nginx/sites-enabled/"
-echo "     sudo nginx -t && sudo systemctl reload nginx"
-echo ""
-echo "  3. Get SSL cert:"
-echo "     sudo certbot --nginx -d ai.maybe.zone"
-echo ""
 echo "============================================"
 echo "  Deployment complete!"
 echo "============================================"
 echo ""
 echo "  Proxy running at: http://127.0.0.1:3100"
-echo "  After nginx+SSL:  https://ai.maybe.zone"
+echo "  Public URL:       https://ai.ein-softworks.com"
 echo ""
 echo "  --- Client Setup ---"
 echo ""
 echo "  Claude Code CLI (~/.claude/settings.json):"
 echo '  {'
 echo '    "env": {'
-echo "      \"ANTHROPIC_BASE_URL\": \"https://ai.maybe.zone\","
+echo "      \"ANTHROPIC_BASE_URL\": \"https://ai.ein-softworks.com\","
 echo "      \"ANTHROPIC_AUTH_TOKEN\": \"$AUTH_TOKEN\","
 echo '      "API_TIMEOUT_MS": "3000000"'
 echo '    }'
@@ -115,7 +102,7 @@ echo ""
 echo "  Roo Code (VS Code):"
 echo "    Provider: Anthropic"
 echo "    API Key: $AUTH_TOKEN"
-echo "    Custom Base URL: https://ai.maybe.zone"
+echo "    Custom Base URL: https://ai.ein-softworks.com"
 echo ""
 echo "  Model routing:"
 echo "    Sonnet requests -> GLM-4.7 (Z.ai)"