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fix(signals): two guesses on one optimistic store around another action's refresh (#4824, #4825) (#4827)

* fix(signals): two guesses on one optimistic store around another action's refresh (#4824, #4825)

A guess lane voiding a hold's staging of a node wakes the readers that
derived from it (#4825), and a render effect pending on another hold's
refresh re-asks, held by it or by none, is seated in the guess's lane
before its pass; the re-ask is found through a source waiting on another's
flight (#4824).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117BoWNSSgtemsSYsaX2hXE

* fix(signals): trim the #4824 seating condition

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117BoWNSSgtemsSYsaX2hXE

* fix(signals): a memo born of a lane re-run reads a parent's flight as the screen (#4824)

The compiled `{cond ? a : b}` (and lowered `<Show>`) re-creates its
condition memo inside the row memo on every run. Born in the guess's lane
pass, that memo saw the re-asked rows pending and held the row while the
count showed the guess. It stands where the one it replaces stood, so it
reads the screen; a boundary's structure, and what a pass with no screen
creates, still see the flight (A29's boundary exemption, #3835).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117BoWNSSgtemsSYsaX2hXE

* fix(signals): serve a lane re-run's new memo only in a guess lane, not a verdict lane (#4824, S-58)

A mount a display-ahead read opens in its verdict lane is born held and
observes the flight (D-25, S-58); only a guess lane's re-run stands in
for the screen.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117BoWNSSgtemsSYsaX2hXE

* chore(size): raise five lane-bundle caps for #4824 and #4825

From size job 131613707099 on 0e0e989 (CI numbers): isPending,
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