release(ci): fix #702 (temperature retry) is unreleased — fleet CI still pins v0.15.0 and every cora-review job fails #708

What

Since ~2026-10-27 14:13 WIB every fleet cora review CI job fails with the same engine error:

Error: LLM API returned status 400: {"error":{"code":"invalid_request_error","message":"`temperature` is deprecated for this model.","type":"invalid_request_error","param":null}}

Verified affected today: gaira runs #55/#56, waca runs #155/#156 (2 PRs). Last green cora-review fleet-wide: waca run #154 (13:41 WIB), gaira run #54 (17:58 WIB).

The retry fix already exists: #702 merged 07:17Z today (retry without temperature when the model rejects it). But:

1. No release carries it — latest release is v0.19.0 (16 Okt).
2. Fleet CI pins v0.15.0 — even older (gaira ci.yml V=v0.15.0; pinned sha256 install path).
3. Runner-native fast path: /opt/cora-tool/bin/cora on runner-01 self-reports 0.15.0; the version check short-circuits the download, so bumping the pin alone is not enough — the native copy must be updated (or the cache invalidated).

Why

The merge-gate amendment (2026-08-28) makes a failed review a BLOCKER: every open PR fleet-wide is now unmergeable through the standard gate (gaira: none open now; waca: #189/#190 blocked). This will bite the next PR on any repo the moment it opens.

Requested

• Cut a cora-code release (v0.20.0) that includes fix(llm): retry without temperature when the model rejects it #702 (+ any other pending fixes)
• Bump the fleet CI pin V=v0.15.0 → the new tag across repos that copy the cora-review job (gaira, waca, metobuz, uteke-mobile, gadio, ...)
• Refresh the runner-native /opt/cora-tool/bin/cora (runner-01) so the fast-path version check matches
• Re-run the currently-red cora jobs (waca bug: config show displays file values instead of resolved effective config #189/fix(v0.4.3): 6 UX fixes from full codebase review #190) to confirm green

Evidence

• waca PR fix(v0.4.3): 6 UX fixes from full codebase review #190 comment (cora-review, stderr tail): temperature 400 error, commit 8e4a320c
• gaira PR feat: landing page overhaul — adopt uteke design system + rtk section structure #163 comment: same error, commit a8d6764e
• Timeline: waca green run feat: release branch setup + install.sh checksum verification #154 started 2026-10-27T13:41+07; first failure run release: sync main with develop (includes install.sh + checksum verification) #155 14:13+07. fix(llm): retry without temperature when the model rejects it #702 merged 07:17:35Z = 14:17 WIB — the outage began within minutes of it, consistent with the gateway/model-side deprecation landing then.