- Add named vectors to GroupHitAdditional struct
- Convert shardsStatus lock to RWMutex and improve segment read performance (read small segments to disk, adjust mmap defaults, add memory watcher)
- Clean up file handlers and descriptors, add shard shutdown status, and fix segment load order on recovery
v1.27.21 - LSM store segments read performance improvements
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Bound digest RPC memtable snapshots to the requested key range and improved async replication performance by negotiating binary digest encoding and carrying byte ID digests end‑to‑end.
Added new REST search endpoints (bm25, hybrid, near object, aggregate counts) and backup role inclusion feature.
Fix async replication handling, including local resolution of replicas, leaked goroutine fixes, and proper tenant restoration on failures.