feat(enrichment): detect xAI and Deepgram API keys in secret-scan

[bohdansolovie]

Summary

• Add xai_api_key rule for xAI keys (xai- prefix).
• Add deepgram_api_key rule for Deepgram keys (dg. prefix).
• Include positive, truncation, and hyphen/dot/underscore continuation negative tests.

Test plan

• npm run build && node --test test/secret-scan.test.ts in review-enrichment/ (78 passing)

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⏸️ Gittensory review result - manual review recommended

_{Review updated: 2026-07-05 01:25:29 UTC}

2 files · 1 AI reviewer · no blockers · readiness 73/100 · CI green · clean

⏸️ Suggested Action - Manual Review

Review summary
The change adds two narrowly-scoped high-confidence secret-scan rules and covers the intended positive, truncation, and continuation cases in the unit tests. The regexes follow the surrounding rule style by requiring a provider prefix, minimum body length, and a negative lookahead to avoid partial matches into longer identifiers. I do not see a reachable correctness break in the visible diff.

Nits — 3 non-blocking

• nit: review-enrichment/test/secret-scan.test.ts:741 only checks xAI underscore and hyphen continuation, while the PR description says dot continuation is covered; either add an `xai-${"a".repeat(16)}.suffix` assertion or tighten the description to say the dot case is Deepgram-only.
• review-enrichment/test/secret-scan.test.ts:741: add the xAI dot-continuation case if you intend dot to be a rejected continuation for all new rules, or leave the regex as-is and adjust the PR description so the test contract matches the implementation.
• Readiness score is below the configured threshold — Use the readiness panel as advisory maintainer context; the score does not block this PR.

Signal	Result	Evidence
Code review	✅ No blockers	1 reviewer
Linked issue	⚠️ Missing	No linked issue or no-issue rationale found.
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (no linked issue context).
Validation posture	❌ 5/25	Preflight is holding this PR: the review lane is unavailable, so it is not ready for automated review.
Contributor workload	✅ 10/10	Author activity: 216 registered-repo PR(s), 130 merged, 9 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	bohdansolovie; Gittensor profile; 216 PR(s), 9 issue(s).
Gate result	✅ Passing	No configured blocker found.

Review context

• Author: bohdansolovie
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository registration is not available in the local Gittensory cache.
• Public profile languages: not available
• Official Gittensor activity: 216 PR(s), 9 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Explain no-issue PR.
• Await review-lane availability.
• Refresh registry data or choose a registered active repo.
• Link the issue being solved, or explicitly explain why this is a no-issue PR.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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Gittensory approves — the gate is satisfied and CI is green.