feat(selfhost): pass repo instructions to cli reviewers

[oktofeesh1]

Summary

• Adds CLI-specific system-append handling so repository review instructions reach self-host CLI reviewers through the system prompt channel.
• Removes the duplicate instruction block from stdin prompts for those CLI reviewers while keeping Workers provider request payloads unchanged.
• Regenerates the self-host environment reference after the source line-number shifts.

Closes #1471

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 an issue, or this is small enough that the summary explains why an issue is not needed.

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:

• None. npm run test:ci passed after rebasing onto current upstream/main; it covers the checked commands above plus the repository's generated-artifact, migration, observability, miner, REES, OpenAPI settings-parity, UI version-audit, and UI test checks.

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

No visible UI layout or state change. The UI file change is the generated self-host environment reference table updating source line references.

Notes

• The change is limited to self-host review prompt handling and the generated environment reference.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.05%. Comparing base (4f085cd) to head (0798c3f).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2954   +/-   ##
=======================================
  Coverage   96.05%   96.05%           
=======================================
  Files         259      259           
  Lines       28571    28594   +23     
  Branches    10396    10407   +11     
=======================================
+ Hits        27444    27467   +23     
  Misses        490      490           
  Partials      637      637           

Files with missing lines	Coverage Δ
src/selfhost/ai.ts	98.18% <100.00%> (+0.05%)	⬆️
src/services/ai-review.ts	95.64% <100.00%> (+0.12%)	⬆️

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