* ci: add macOS to cross-platform test matrix
* ci: run integration tests on all platforms, add macOS to matrix
* ci: add build step before cross-platform integration tests
Worker pool requires compiled parse-worker.js in dist/.
Without build, falls back to sequential parsing which times out
on macOS runners.
* fix(pipeline): resolve worker path to dist/ when running under vitest
import.meta.url points to src/ under vitest where no .js exists.
Fall back to dist/core/ingestion/workers/parse-worker.js so worker
threads spawn correctly on all platforms instead of sequential fallback
that times out on slower macOS CI runners.
* ci: split cross-platform unit and integration tests into parallel jobs
* test: add integration tests for worker pool and hooks e2e
- worker-pool.test.ts: 7 tests verifying dist/ worker spawning,
multi-file parsing, progress reporting, and clean termination
- hooks-e2e.test.ts: 28 tests with real git repos testing staleness
detection, embeddings flag, mutation regex, cwd validation,
and .gitnexus directory discovery
* refactor: extract shared hook test helpers and simplify worker fallback
- Extract runHook/parseHookOutput into test/utils/hook-test-helpers.ts
- Deduplicate fileURLToPath calls in pipeline.ts worker resolution
- Add isDev logging for worker pool creation failures
* fix(test): accept timeout as valid outcome for PreToolUse CLI spawn
The Plugin hook spawns `gitnexus augment` which may hang on macOS
when the CLI is unavailable, causing a 10s timeout (status=null)
instead of a clean exit (status=0). Accept both as non-crash outcomes.
