feat: add Puppetflow template

[jr-k]

Summary

Adds a minimal Puppetflow deployment backed by SQLite, based on the official self-hosted installer configuration.

• runs the application, one queue worker, scheduler, browser gateway, stream relay, and Redis
• generates the application key, browser stream secret, and Pinokio token through Dokploy helpers
• configures separate HTTPS domains for the application and browser stream relay
• persists SQLite data, uploads, execution files, and downloaded browsers
• pins all container images

Testing

• node build-scripts/generate-meta.js --check
• npm run validate-template -- --dir ../blueprints/puppetflow --verbose
• npm run validate-docker-compose -- --file ../blueprints/puppetflow/docker-compose.yml --verbose
• docker compose config --quiet
• started the full stack locally from empty volumes
• confirmed migrations completed, Redis and Pinokio became healthy, the stream relay connected to Redis, the queue started, and /up returned successfully

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Name	Status	Preview	Last Commit
templates	✅ Ready (View Log)	Visit Preview	dda5fb1