feat(review): surface aggregate review-effort in maintainer stats (#2155)

[claytonlin1110]

Summary

• Add reviewEffort (avgBand + totalEstimatedMinutes) to the bearer-gated maintainer stats payload in src/review/stats.ts.
• Read persisted reviewEffortMinutes from audit_events (same source as public-stats) within the stats window, deduplicating per PR and mapping minutes back to bands via bandFromMinutes.
• Degrade to { avgBand: null, totalEstimatedMinutes: 0 } when the effort query is empty or fails; public-stats remains unchanged.

Closes #2155

Scope

• The PR title follows type(scope): short summary Conventional Commit format, for example fix(api): restore profile access checks.
• This PR is focused and does not mix unrelated backend, UI, MCP, docs, dependency, and deploy changes.
• This follows CONTRIBUTING.md and does not reintroduce GitHub Pages, VitePress, site/, or CNAME.
• I linked a currently open issue this PR resolves (e.g. Closes #123) — a linked open issue is required for every contributor PR.

Validation

• git diff --check
• npm run actionlint
• npm run typecheck
• npm run test:coverage locally; codecov/patch requires ≥99% coverage of the lines AND branches you changed (aim for 100% on your diff so CI variance does not fail near the threshold). Global coverage is a non-blocking trend with a loose 90% backstop, not the gate.
• npm run test:workers
• npm run build:mcp
• npm run test:mcp-pack
• npm run ui:openapi:check
• npm run ui:lint
• npm run ui:typecheck
• npm run ui:build
• npm audit --audit-level=moderate
• New or changed behavior has unit/integration tests for new branches, fallback paths, and sanitizer boundaries

If any required check was skipped, explain why:

• Full npm run test:ci could not be completed locally: cf-typegen:check requires wrangler on PATH (ENOENT), and the local tree reports unrelated processors.ts parse errors on main. Scoped tests pass: npx vitest run test/unit/stats.test.ts test/unit/review-effort.test.ts (41 tests). Changed-source coverage for stats.ts is 100% lines / 100% branches on the new paths.

Safety

• No secrets, wallet details, hotkeys, coldkeys, user PATs, private keys, raw trust scores, private rankings, or private maintainer evidence are exposed.
• Public GitHub text stays sanitized, low-noise, and does not imply compensation guarantees or optimization tactics.
• Auth, cookie, CORS, GitHub App, Cloudflare, or session changes include negative-path tests.
• API/OpenAPI/MCP behavior is updated and tested where needed.
• UI changes use live API data or real empty/error/loading states, not production mock/demo fallbacks.
• Visible UI changes include a UI Evidence section below with JPG/JPEG or PNG screenshots arranged as organized, captioned, clickable thumbnails. SVG screenshots are not used as review evidence. Review-only screenshots or recordings are not committed to the repository.
• Public docs/changelogs are updated where needed; changelogs are only edited for release-prep PRs.

UI Evidence

N/A — backend-only maintainer stats payload change; no visible UI.

Notes

Part of #1955. The aggregate is intentionally limited to the bearer-gated /stats/data feed, not getPublicStats.

[superagent-security]

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.68%. Comparing base (c2c6eb3) to head (8764e63).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4024   +/-   ##
=======================================
  Coverage   93.68%   93.68%           
=======================================
  Files         384      384           
  Lines       35997    36007   +10     
  Branches    13212    13213    +1     
=======================================
+ Hits        33723    33733   +10     
  Misses       1618     1618           
  Partials      656      656           

Files with missing lines	Coverage Δ
src/review/review-effort.ts	100.00% <100.00%> (ø)
src/review/stats.ts	98.73% <100.00%> (+0.16%)	⬆️

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Warning

🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨

⏸️ Gittensory review result - manual review recommended

_{Review updated: 2026-07-07 13:27:30 UTC}

4 files · no blockers · readiness 96/100 · CI pending · blocked

⏸️ Suggested Action - Manual Review

Signal	Result	Evidence
Code review	✅ No blockers	No AI review summary
Linked issue	✅ Linked	#2155, #123
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 (draft PR; 2 linked issues).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 442 registered-repo PR(s), 303 merged, 102 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	claytonlin1110; Gittensor profile; 442 PR(s), 102 issue(s).
Gate result	✅ Passing	No configured blocker found.

Review context

• Author: claytonlin1110
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: Python, JavaScript, TypeScript, Rust
• Official Gittensor activity: 442 PR(s), 102 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Mark ready when done.

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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[JSONbored]

Sorry, marked this as draft when we previously had failing CI, so that it wasn't incorrectly closed with a failing review. Should be safe to flip back to ready to review whenever you're ready - thanks @claytonlin1110