krishvishal opened a new pull request, #3223:
URL: https://github.com/apache/iggy/pull/3223
## Summary
- Cache committed reply bytes per-client in `ClientTable` (`CachedReply,
refcounted `Frozen` buffer, Arc-bump on dedup) and deliver them to in-process
subscribers via a oneshot channel embedded in `PipelineEntry. Replaces the
prior `Notify`/pending-map indirection; awaiters no longer need a separate
cache lookup after wakeup.
- `ClientTable` is metadata-only. Partition plane is at-least-once;
consumers handle duplicates.
- New `EvictionHeader` / `EvictionReason` wire frame; typed reasons let the
SDK trigger its eviction callback.
- Two-queue pipeline: `prepare_queue` (cap 8) plus a buffered
`request_queue` (cap 64). `is_full()` reports only the prepare queue so
admission stays separate from drop-on-full backpressure. View-change reset
cancels subscribers and clears the request queue; the prepare queue survives
for DVC reconciliation.
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