Rivetr v0.1.0 - First stable release

Features:
- Full deployment lifecycle (clone → build → deploy → health check → switch)
- Docker and Podman container runtime support
- GitHub, GitLab, Bitbucket webhooks and OAuth integration
- GitHub App integration for seamless deployments
- Managed databases (PostgreSQL, MySQL, MongoDB, Redis)
- Docker Compose services with 26 one-click templates
- Environment variables with AES-256-GCM encryption
- SSL/TLS with automatic Let's Encrypt certificates
- Real-time log streaming and browser terminal
- Teams and RBAC with role-based permissions
- Volumes management with backup/export
- ZIP file upload deployment with build type detection
- Nixpacks and Static site builders

Security:
- Constant-time token comparison
- Command injection protection
- Strong password requirements
- Security headers middleware
- Rate limiting

Platform:
- Single binary deployment (~30MB RAM idle)
- SQLite embedded database
- systemd service with auto-restart