fix(ci): build @loopover/contract before packing the MCP and miner packages

[JSONbored]

Closes #9946

Both publish workflows fail on every main commit, and have for as long as the run history goes back — three retries per push, never one success. Neither package has actually been publishing.

Root cause

packages/loopover-contract/dist is gitignored. Both workflows already build @loopover/engine for exactly that reason, with a comment explaining it — but neither builds the contract, and both packages import it:

bin/loopover-mcp.ts(16,8):       TS2307: Cannot find module "@loopover/contract/api-schemas"
bin/loopover-miner-mcp.ts(5,44): TS2307: Cannot find module "@loopover/contract"
lib/github-token-resolution.ts(22,8): TS2307: Cannot find module "@loopover/contract/cli-config"

Verified, not assumed

Deleted the contract dist/ and ran each workflow’s own build command: 9 unresolved imports for MCP, 7 for the miner. Added npm run build --workspace @loopover/contract and both pass. actionlint clean.

Scope is exactly these two — publish-contract already builds itself, and publish-engine / publish-mcp-registry / publish-ui-kit don’t depend on the contract.

Why it stayed invisible

The failure lives in a publish workflow, not validate-*, so PR CI stays green and the gate is unaffected. Main’s rollup showed red, but it read as release noise rather than "this package has not shipped since it started importing the contract".

Worth a separate look: three failed attempts per commit, indefinitely, is a pipeline telling nobody. A publish failing identically on consecutive commits should surface once, loudly, rather than re-failing quietly forever.

[loopover-orb]

Important

🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨

⏳ LoopOver is waiting…

LoopOver has seen this pull request and is waiting on CI checks to finish before reviewing it. This comment will update once the review runs.

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

[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 91.88%. Comparing base (35fceed) to head (78a14cb).
⚠️ Report is 4 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9947   +/-   ##
=======================================
  Coverage   91.88%   91.88%           
=======================================
  Files         928      928           
  Lines      113670   113670           
  Branches    27411    27411           
=======================================
  Hits       104440   104440           
  Misses       7931     7931           
  Partials     1299     1299           

Flag	Coverage Δ
backend	95.67% <ø> (ø)

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