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fix(signals): a released memo's queued retry runs before the release (#4474) (#4535)

* fix(signals): a released memo's queued retry runs before the release (#4474)

An unowned (or lazy: true) memo blocked on an uninitialized async source is
re-enqueued by the source's landing like any dependent; the settle walk then
found it unobserved and released it, and the release pulled the retry back
out of the heap. The memo never computed the landing and woke later with no
value: latest() returned undefined beside isPending() === true.

The release now waits for the pass the walk queued (REACTIVE_RELEASE_AFTER):
releaseIfSettledUnobserved marks a node already in the heap instead of
releasing it, and recompute's tail releases it after the retry if it is still
unobserved and settled. One retry, then the release (#2934); reads revive and
the pre-heap sweep still reclaims a dormant memo dirtied in the same tick
(#3078). Laziness is never observable (D-22).

Co-authored-by: Cursor <cursoragent@cursor.com>

* chore(size): batch ledger re-record over next @ 62745f6 with #4535

Batch re-record for #4547, #4554, #4558, #4555, #4560 and #4535, from CI's
head size job 124750323866 on 0f5daf3. Five rows were over their brotli
caps with minified below the recorded size (#4560's savings): caps raised
to measured + 10 B rounded up to 0.01 KB, recorded minified lowered to
measured. The frozen floors are unchanged; page: live server components
stays over its brotli cap within the minified allowance (-80 B).
Hello world 9,954 B / 9.98 KB, render + one signal 9,780 B / 9.80 KB.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015hPxMkC3jg3Uivh65gvaf2

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Claude <noreply@anthropic.com>

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