feat(mcp): add remote + stdio tool surfaces for loopover_get_repo_focus_manifest

[xfodev]

Summary

Adds the two missing MCP surfaces for loopover_get_repo_focus_manifest (a repo's own persisted focus manifest + compiled policy): a remote MCP tool in src/mcp/server.ts and a local stdio MCP tool in packages/loopover-mcp/bin. Mirrors the two-surface loopover_get_maintainer_noise shape but replicates the underlying GET /v1/repos/:owner/:repo/focus-manifest route's own auth — requireRepoAccess (the read-level maintainer/owner/operator + session-repo-access mirror), not the stricter requireRepoApprovalQueueAccess (which adds a live-write check the GET route does not perform).

Read-only, per the issue's scope boundary: no tool for the refresh(POST)/PUT write routes, no new REST route, no new human CLI verb.

What changed

• src/mcp/server.ts: register loopover_get_repo_focus_manifest (input ownerRepoShape, focusManifestOutputSchema returning { repoFullName, manifest, policy }), add its MCP_TOOL_CATEGORIES entry ("maintainer"), and a getRepoFocusManifest handler calling loadRepoFocusManifest + compileFocusManifestPolicy exactly as the GET route does, behind requireRepoAccess.
• packages/loopover-mcp/bin/loopover-mcp.ts: register the local stdio tool proxying GET ${repoBase}/focus-manifest via apiGet.

Testing / coverage

• test/unit/mcp-output-schemas.test.ts: authorized success (seeded manifest → { repoFullName, manifest.present, policy }) and the forbidden branch (static mcp identity outside the read allowlist → cannot access this repository); added the tool to TOOLS_WITH_OUTPUT_SCHEMA. Both run in-process against LoopoverMcp(env).createServer(), so every changed line/branch in src/mcp/server.ts is Codecov-covered.
• test/unit/mcp-cli-repo-focus-manifest.test.ts: in-process stdio invocation (via loopover_plan_repo_issues has no REST route, CLI command, or local stdio MCP tool #7764's isProcessEntrypoint guard + InMemoryTransport) so the bin tool's apiGet-proxy body gets real Codecov-measured coverage — a subprocess spawn can't be v8-instrumented.
• test/unit/mcp-tool-rename-aliases.test.ts: tool-count invariant → 83. This also reconciles a pin drift — feat(mcp): add remote + stdio tool surfaces for loopover_get_activation_preview #7887 registered loopover_get_activation_preview's stdio tool without bumping this pin (live count had reached 82), documented inline in the same convention as the earlier #6942 note.

Incidental regression fix (required for CI)

This PR's packages/loopover-mcp/** change pulls the whole mcp-cli-*.test.ts suite into CI's scoped test selection, which surfaced a pre-existing failure: test/unit/mcp-cli-activation-preview.test.ts (added by #7887) hangs to its hook timeout on main. #7764 later gated the bin's top-level await server.connect(...) behind isProcessEntrypoint() (realpath(argv[1]) === realpath(this module)); that test set argv[1] to the bare string "loopover-mcp", so realpathSync throws → the guard is false → the server never connects → client.connect hangs. #7887 merged just before #7764, so its own CI never ran against the guard. Fixed by pointing argv[1] at the bin's resolved path (test-only change).

No REST/OpenAPI change (the focus-manifest route already exists), no migrations, no wrangler changes.

Closes #7808

[superagent-security]

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

[loopover-orb]

This repository reviews pull requests one-shot: the PR must be correct as originally opened. Pushing an additional commit closes it automatically instead of restarting review — open a fresh pull request with every fix included.

[codecov]

Codecov Report

❌ Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.85%. Comparing base (b3e1bc3) to head (07adbff).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/mcp/server.ts	25.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #7918       +/-   ##
===========================================
+ Coverage   58.78%   80.85%   +22.06%     
===========================================
  Files         730       90      -640     
  Lines       74842    24387    -50455     
  Branches    22839     4691    -18148     
===========================================
- Hits        43999    19719    -24280     
+ Misses      27180     4427    -22753     
+ Partials     3663      241     -3422     

Flag	Coverage Δ
shard-1	22.75% <27.27%> (?)
shard-2	21.80% <45.45%> (-25.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/loopover-mcp/bin/loopover-mcp.ts	13.60% <100.00%> (+0.30%)	⬆️
src/mcp/server.ts	57.27% <25.00%> (+9.47%)	⬆️

... and 640 files with indirect coverage changes