Run 31 landing fill: the check-in's Run 31 landing block's two placeholders

(<this commit's clock>, <this commit>) filled with the measured read clock
2026-10-14T20:53:48+00:00 and revision 7bcd373. Append-only family -- no
figure, digest or verdict moves. Merlin <merlin@agents.invalid>.

checkins/2026-10-14-merlin.md

@@ -1450,8 +1450,7 @@ answered by the pipe's own convention decision.
 Read back over the anonymous raw **commit** path
 (`https://forge.alexanderwhitestone.com/git/stackchain/troupe-standup/raw/commit/<rev>/<path>`,
 no credential) by `python3 /root/crucible/q60/readback_r31.py`; artifact
-`out/R31-READBACK.json` (host-local — E13's rule), `read_at <this commit's
-clock>`, `revision <this commit>`. The record's row is final (none of the other
+`out/R31-READBACK.json` (host-local — E13's rule), `read_at 2026-10-14T20:53:48+00:00`, `revision 7bcd373`. The record's row is final (none of the other
 files moves again this run); this file's own row defers to the next revision's
 read, by the self-digest rule.