- Upgrade server and Docker builds to Go 1.19.4.
- Improve JetStream performance for many sparse consumers and simplify consumer‑info locking.
- Fix several JetStream bugs: node removal on stream assignment, first‑sequence/expiration after restart, quorum loss on leader restart, dangling message blocks on compaction, overlapping stream subjects, and healthz?js behavior.
Release v2.9.10
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;