Fix SoftReadWriteLock state lock timeout - #726
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Fixes #725.
The internal
.statelock currently uses an unbounded acquisition, so a cross-host stale marker can block aSoftReadWriteLockacquisition indefinitely even when the caller supplies a finite timeout.This change bounds
.stateacquisition by the caller's deadline and avoids an unbounded cleanup wait after a timed-out acquisition.Added deterministic regression tests covering write, read, and the writer phase-2 cleanup path.