fix(comments): keep repo outcome patterns out of public duplicate checks

[JSONbored]

Motivation

• Repo outcome-pattern details (path/label buckets and merge-rate counts) were copied into generic riskReasons/whyThisHelps and could be surfaced by the public @gittensory duplicate-check renderer, leaking authenticated repo-specific guidance and contributor-controlled path/label text.

Description

• Stop folding repoOutcomePatterns detail lines into the generic riskReasons and whyThisHelps arrays so outcome patterns remain available only via the dedicated repoOutcomePatterns field in decision packs.
• Harden duplicate-check rendering by introducing isPublicDuplicateCautionLine and mentionsRepoOutcomePatternDetail to filter out repo outcome-pattern detail strings before selecting or publishing caution lines.
• Make mentionsDuplicateRisk use the same public-safe filter so cached action records containing outcome-pattern text are not treated as public duplicate/WIP signals.
• Add/adjust unit tests to assert repo outcome patterns stay scoped to the private field and that duplicate-check comments do not publish merge/closure guidance or pattern text.

Testing

• Ran targeted unit tests with npm test -- --run test/unit/decision-pack.test.ts test/unit/github-commands.test.ts and all tests in those suites passed.
• Ran TypeScript typecheck with npm run typecheck and the project passed type checking.
• Verified repository diff/checks (git diff --check / local test runs) showed no lint/type regressions.

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Codex Task

[ghost]

Note

Gittensory Gate skipped

PR closed before full evaluation. No late first comment was created.

Signal	Result	Evidence	Action
Gate result	⚠️ Skipped	#493 is no longer open.	No action.

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Superagent didn't find any vulnerabilities or security issues in this PR.