The r3 fold made park refuse an older voice once a newer one from the same
sender had parked. With one /sync batch holding [v1 (slow gate), m1 bare
mention, v2 (fast)], v2 parked first, v1 was then refused, and m1 claimed
v2 -- a voice sent after the mention. v1 was lost and v2's own mention was
answered as empty text.
The bare mention now takes an arrival limit (ParkedVoices.mark) before it
settles, and claim pops the newest parked voice that began before that
limit, dropping older ones. park no longer refuses by arrival; parked
voices are kept per sender ordered by seq (bounded to 4). A claim made
while gates are still in flight records a floor, so a late older voice
(seq <= claimed) cannot park and outlive the claim; the floor clears when
the sender's in-flight list empties. One answer per bare mention, newest
before the mention wins, and the r3 orphan case still leaves nothing
parked.
Also: pending() ignores entries past CLAIM_WINDOW_SECONDS so an expired
voice no longer sends every later text through the mention regexes; the
m.thread root lookup is one _thread_root helper used by both the park
decision and its pre-check; voice_gate is annotated.
The kept test gains a [voice slow, mention, voice2 fast] + mention2 row:
red on a932dc031c (['$voice2', '$text2']) and on f1ea71de7c
(['$voice', '$text2']).
Co-authored-by: miregal89 <142085869+miregal89@users.noreply.github.com>
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