feat(mcp): add gittensory_check_test_evidence tool (#2235)

[kiannidev]

Summary

• Adds buildCheckTestEvidenceReport and registers gittensory_check_test_evidence on the hosted /mcp Worker — metadata-only coverage-gap classification + guidance from changed paths and optional test paths (feat(mcp): add gittensory_check_test_evidence tool (deterministic coverage-gap self-check) #2235).
• Fixes scripts/check-miner-package.mjs to allow nested lib/*/ subdirectories (required after the chore(miner-selfimprove): scaffold packages/gittensory-miner calibration module directory + shared types #2332 calibration module landed — unblocks CI check-miner-package for all PRs).
• Tests cover code-only, code+tests, docs-only, adequate/weak/strong bands, nested calibration pack paths, MCP output schemas, and tool invocation.

Closes #2235

Conflict avoidance

Touches src/mcp/check-test-evidence.ts, src/mcp/server.ts, scripts/check-miner-package.mjs, and unit tests only — no overlap with open PRs (#3765 ci.yml, #3764 deps, #3763 path-matchers, #3760/#3755/#3721/#3698 processors, #3724 local-branch, #3712 visual).

Test plan

• npx vitest run test/unit/mcp-check-test-evidence.test.ts test/unit/check-miner-package.test.ts
• npm run typecheck

Made with Cursor

[superagent-security]

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

[codecov]

Codecov Report

❌ Patch coverage is 92.85714% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@5cbc5aa). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/mcp/check-test-evidence.ts	90.47%	0 Missing and 2 partials ⚠️

❌ Your patch check has failed because the patch coverage (92.85%) is below the target coverage (99.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3770   +/-   ##
=======================================
  Coverage        ?   93.29%           
=======================================
  Files           ?      318           
  Lines           ?    32396           
  Branches        ?    11877           
=======================================
  Hits            ?    30225           
  Misses          ?     1537           
  Partials        ?      634           

Files with missing lines	Coverage Δ
src/mcp/server.ts	95.91% <100.00%> (ø)
src/mcp/check-test-evidence.ts	90.47% <90.47%> (ø)

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