Stand down when a sync belongs to another app in the repo

[arvida]

Part of localheroai/localhero-ai#841. Server side: localheroai/localhero-ai#860 (merged).

The bug

In a monorepo with one Localhero project per app, every matrix job receives the same localhero-sync dispatch. Each runs ci in sync mode, and the API key is organization-wide, so a sibling app fetches another app's sync and tries to write its files into its own folder. On newsroom-demo that was a red portal job (Source file is required for creating new JSON translation files) and a cancelled editor job.

The change

• getSyncTranslations sends the config's projectId; the server answers with project_matches, resolved with friendly_id so a slug or a numeric id both work.
• On project_matches: false, runSyncMode prints one line (a ::notice:: in Actions) and returns before validating config, writing files, saving config, committing, or completing the sync update. ci exits 0: a job that is not the target has nothing to do.
• No project_matches (older server): unchanged behaviour.

Ownership is checked with the raw config ci() already read, before getValidProjectConfig(), so a sibling app whose config would fail validation still exits 0 instead of failing the matrix.

Also in this branch: the Jest ignore for .claude/ is anchored to <rootDir>. The main checkout still skips worktree copies (#111), and npm test inside a .claude/worktrees/ checkout finds its own tests again instead of none.

Verified

• Unit tests: mismatch does nothing (multi-page fixture and a sync version, so "no further pages" and "no completion" are real branches); projectId sent on every page.
• tests/commands/ci-monorepo.test.ts: two app folders on a real filesystem, each with its own localhero.json, run from each. Fails with the guard disabled.
• Full suite: 1477 passed.
• Local end to end against the server change with the newsroom-demo monorepo:
  • 0.0.78 from apps/portal reproduces #841, exit 1
  • this branch from apps/portal: notice, exit 0, no file changed
  • this branch from apps/editor: the edit lands, with the slug or the numeric id in localhero.json
  • this branch from apps/portal with outputLocales: []: still exit 0

Not covered locally: the dispatch, the Action matrix and the commit. Next step is an RC on newsroom-demo with portal back in the matrix.