docs(handoff): ranks 9 and 22 close by measurement; #4768's root cause retracted

[ZacxDev]

Follow-up to #600, landed through handoff_doc.py rather than by hand.

Why a second PR

#600 was written with Edit, so the handoff write-back guard's instrument could not see it and the Stop hook blocked the turn — correctly. Both halves were true: the work was recorded, and the tool that measures it had no idea. This PR re-lands the delta through handoff_doc.py, which is also what enforces the byte ceiling, the durable-drop warning, the forcing:/via: gates and the ranked-list ratchet. That lesson is now a Gotcha in the doc.

🔴 The tool's drop-warning cannot see a table — and it fired silently here

## State now is a REPLACE heading. The merge diff dropped the whole Merged this session SHA table — seven rows, with no durable-line warning printed. The doc already warns about this exact failure ("handoff_doc.py's durable-line warning reads prose and does not see a table, so it flagged 3 unrelated lines while 8 shas were silently in the drop set") and it happened anyway, to me, one section below the warning.

Those shas are rescued into ## Gotchas — an APPEND heading, where nothing replaces them — along with the cli#591 concurrent-merge lesson that rode with them.

What the delta records

rank 22	closed — #601 (b727a83), the ordering pinned at the sentinel and the exit code
rank 9	closed in the terms it was stated in — scheduled run 34848144324, drift=success, 0 failing steps / 15 executed
rank 25	🔴 #4768's root cause RETRACTED: a Redis cache decoder (isNaN(Number(v)) ? v : Number(v)), not Meilisearch. Two platform PRs open, order-dependent: event-engine-common#13 before civitai#4839. Neither audited
—	cli#575 R2–R4 accepted in writing; devdocs#5 merged (23c6d46) after re-verifying its claim live

A closing-condition: was added to ## Goal — the doc had none, and it is frozen at round 1 so the arcs this work spawned cannot extend it.

Budget

The doc hit its 65,536 B ceiling twice during the previous session and once more here. Fixed the way the playbook prescribes — evicting what has CLOSED, never an open investigation or a ruled-out theory. Three blocks moved verbatim to claudedocs/refs/ (devdocs#76, the devdocs#80 ladder, the tab-forgery block), each leaving a headline pointer. Now 65,342 B.

🔴 The second commit exists because handoff_doc.py's commit is path-limited to the handoff doc, so the refs/ half of an eviction is left uncommitted — unsaved work one routine checkout from silent deletion.

clawgate-task: — none written. resolve exited 5; an unknown session id also answers 200 with an empty array, so that zero is not a clean bill of health.