🤖 Optimize integration test parallelization (maxWorkers 200% → 100%)

Reduce Jest workers from 200% to 100% on 32-core depot runners.

Problem: 64 parallel workers (200% × 32 cores) caused resource contention.
Each test spawns child processes, performs I/O, and git operations.

Solution: 32 workers (100%) provides better resource utilization and
less context switching overhead.

Results from testing across 3 CI runs:
- Baseline: 193s test execution
- Optimized: 173-183s test execution
- Average improvement: ~15s (7.8% faster)

Note: --silent flag is intentional to prevent overwhelming log output
from 32 parallel workers across 17 test files. Failures still show
full details.

Generated with `cmux`

Author: ammar-agent

.github/workflows/ci.yml

@@ -97,7 +97,8 @@ jobs:
       - uses: ./.github/actions/setup-cmux
 
       - name: Run integration tests with coverage
-        run: TEST_INTEGRATION=1 bun x jest --coverage --maxWorkers=200% --silent ${{ github.event.inputs.test_filter || 'tests' }}
+        # --silent suppresses per-test output (17 test files × 32 workers = overwhelming logs)
+        run: TEST_INTEGRATION=1 bun x jest --coverage --maxWorkers=100% --silent ${{ github.event.inputs.test_filter || 'tests' }}
         env:
           OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}