- Added new JetStream capabilities: stream sealing, roll‑up support, header‑only consumer delivery, and configuration limits for delete/purge/roll‑ups.
- Improved MQTT client‑ID logging, updated JWT library to v2.1.0, and refreshed Go doc strings and code cleanup.
- Fixed multiple JetStream, RAFT, consumer, websocket, and data‑race issues, plus corrected header handling and stream offset behavior.
Release v2.6.2
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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;