feat: add Kanboard project management service

- Add kanboard subdomain to domains.yml
- Create Docker Compose template with SQLite backend and plugin store enabled
- Add Ansible task for service deployment
- Configure Caddy reverse proxy routing
- Integrate with productivity services category

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

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

roles/docker/files/Caddyfile

@@ -40,6 +40,10 @@ tasks.thesatelliteoflove.com {
     reverse_proxy mmdl:3000
 }
 
+kanboard.thesatelliteoflove.com {
+    reverse_proxy kanboard:80
+}
+
 phlog.thesatelliteoflove.com {
     reverse_proxy ghost-1-ghost-1:2368
 }