[Improve] Skip “CI is passing” padding in PR review notifications

[roomote-roomote]

Opened on behalf of Matt Rubens. Follow up by mentioning @roomote-roomote, in the web UI, or in Slack.

What changed

PR review notification triage now tells the model to focus chat copy on actionable offers — open review feedback, failed CI, or merge conflicts — and to skip “CI is passing” / all-green padding whenever findings are already worth acting on. Green CI is only mentioned when there is nothing else actionable (for example a clean self-review with no issues). Failed checks and conflicts stay high-signal CTAs.

Why this change was made

When Roomote flagged real findings, messages were still finishing with “All listed CI checks are passing,” which diluted the offer to help. Notifications should lead with the fixable problem, not burn space on green status.

Impact

Users get tighter PR review notification copy that emphasizes “want me to look at this comment / failure / conflict?” and only mentions successful CI when that is the useful context left.

[roomote-roomote]

No code issues found. See task

This change is prompt-only: it refines the PR-review notification triage system prompt to skip "CI is passing" padding when there is already actionable feedback, and only mention green CI when nothing else is actionable. The rules read coherently with the surrounding prompt (failed CI and merge conflicts stay high-signal). The test additions correctly assert the new prompt strings, and the full pr-review-notification-delivery suite passes (23/23). The CHANGELOG.md markdown-escape tweak (R\_\*) is cosmetic and harmless.

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