chore(upstream-watch): record the 2026-09-28 closures and replies in the registry (#258)

* chore(upstream-watch): record today's upstream closures in the registry

agentic-qe closed ten of our threads on 2026-09-28: no. 734 is retired
(fixed; nothing in ak waits on it), no. 736 is adopted with first fixed
version 3.14.4 (confirmed by the maintainer's re-test), and no. 735 and
nos. 753-759 are fixed upstream but unreleased. Ruflo nos. 3444, 3445
and 3473 are fixed upstream but not in 3.47.1. The agentic-qe no. 574
adjustment now follows the Windows confirmation: 3.14.4 reports
LockHeld, not FsyncFailed, after a live lock.

* chore(upstream-watch): record today's upstream replies in the registry

Adds a dated "commented" history line, with the comment link, for each
reply posted on 2026-09-28: agentic-qe no. 528, 532, 535, 574, 734, 736
and 756, and ruflo no. 420, 952, 2356 and 2885.

The threads that were only cited before (agentic-qe no. 528, 532 and
535, ruflo no. 420 and 2356) now carry relation "commented". agentic-qe
no. 736 is retired: adopted in ak and closed upstream, as the watch
proposed.

* chore(upstream-watch): record the Codex reply and backfill unrecorded comments

Adds today's reply on openai/codex no. 16045 (issuecomment-5878392424).

A sweep of every active watch entry against its GitHub comments found
seven comments of ours that no history line recorded; each is added with
its date and link:
- openai/codex no. 16045 and ruvnet/ruflo no. 952: 2026-09-27
- ruvnet/ruflo no. 3196: 2026-09-09, 2026-09-20 and 2026-09-27 (its
  2026-09-26 line gains its link)
- ruvnet/ruflo no. 2885: 2026-09-26
- pacphi/agentic-kit no. 240: 2026-09-27

Author: pacphi