Restate 1.6: more control, better cloud support, less tuning

Restate 1.6 introduces enhanced control over invocations, allowing users to manually pause, resume, and restart them from specific journal entries, facilitating smoother error resolution and workflow continuation. This release simplifies deployment across major cloud platforms like AWS, Azure, and Google Cloud, and reduces operational overhead through smarter defaults and automatic memory management. Users benefit from improved error reporting in the UI, more efficient snapshot management, and comprehensive monitoring capabilities with pre-built Grafana dashboards. The deployment API has been refined to enhance CI/CD pipeline robustness, offering idempotent registration and safer deployment practices. Restate 1.6 also provides native cloud storage support, efficient log trimming, and an accessible quickstart guide through Restate Cloud, all while maintaining its open-source, free availability on GitHub.