- Fixed core broker permission event typo and shovel plugin upgrade issue, plus minor MQTT warning suppression.
- Added diagnostics CLI command, Grafana dashboard producer counters, and OAuth2 login redirect improvement.
- Requires Erlang 25 (fails on older versions) and supports up to Erlang 26.1.x, introducing a breaking compatibility change.
RabbitMQ 3.12.9
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Core server bug fixes: duplicate direct‑reply deliveries, quorum queue recovery issues, malformed AMQP 1.0 frames, topic‑exchange wildcard limits, and OAuth proxy header handling.