ntfy

This is a fast-follow release that enables Postgres read replica support.

To offload read-heavy queries from the primary database, you can optionally configure one or more read replicas using the database-replica-urls option. When configured, non-critical read-only queries (e.g. fetching messages, checking access permissions, etc) are distributed across the replicas using round-robin, while all writes and correctness-critical reads continue to go to the primary. If a replica becomes unhealthy, ntfy automatically falls back to the primary until the replica recovers.

Features:

• Support PostgreSQL read replicas for offloading non-critical read queries via database-replica-urls config option (#1648)
• Add interactive config generator to the documentation to help create server configuration files (#1654)

Bug fixes + maintenance:

• Web: Throttle notification sound in web app to play at most once every 2 seconds (similar to #1550, thanks to @jlaffaye for reporting)
• Web: Add hover tooltips to icon buttons in web app account and preferences pages (#1565, thanks to @jermanuts for reporting)