merge main#39
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Release v1.296.0
…ic StreamWriterBuilder; fix async fetch lifetime captures
getPtr/getRef/operator[] hit path took the global spinlock, serializing ~20 threads behind a 33-slot scan (87% CPU in pause). Add a reader counter on the memLock byte: INDEX hit + OFFSET in-page hit take shared, miss/evict/reset/dump exclusive. pinCount/pinnedNow atomic, unpin on shared side. Fix static result-pointer race (read after unlock).
fix deadlock bugs
… fixes) Wait-loop keeps both sides: my acquireMemLock() reader-drain re-acquire + main's pin-exhaustion warning/heartbeat logging.
acquireMemLock's drain only waits for shared holders (hit-path/unpin), which do no IO, so the main-thread flushAsyncFileIOBuffer there was dead weight (and fired on every thread on lite builds where isMainThread()==true). Plain spin. Claim-side pump kept (a writer ahead may async-IO under the lock).
A cached page is always <= currentPageId (currentPageId is raised before the load that puts the page in cache, and is monotonic), so the hit-path max was always a no-op. Removing it leaves currentPageId written only under the exclusive lock -> the atomic CAS helper is gone too.
add --swap-dirty-track (mprotect-armed pages + SIGSEGV mark) to skip writeback for clean-evicted pages
…ts; drain in-flight IO before snapshot
optimize swapvm lock
Release v1.297.0
Re-hash only changed 8KB chunks via mprotect+SIGSEGV dirty-track; on by default on Linux (--no-k12-state-cache), with quorum-mismatch full-recompute fallback.
Obsolete now that the K12 state-digest cache makes per-tick verification cheap. Behavior-preserving (the flag was already force-disabled). Drops securityTick/forceDontUseSecurityTick, the F2 toggle, and --security-tick.
Feat/k12 state digest cache
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