Here is a summary of the provided text in one paragraph: Promscale, an open-source analytical platform and long-term store for Prometheus data, has improved its support for Prometheus high-availability, multi-tenancy, user permissions, and more. The system uses immutable leases to elect a single leader Prometheus replica and allows multiple Promscale connectors to process write traffic concurrently, increasing write throughput. It also handles delayed data correctly by saving it if it came from the "leader" replica for that data-time or discarding it otherwise. Promscale supports high-availability at every step of the ingest pipeline, has continuous streaming backups, and implements a role-based access control system to protect user data. The system is designed to be loosely coupled and scalable, with independent layers that can scale independently, allowing for better performance and reliability in production observability data systems.