perf: Optimize Jest configuration for CI stability

- Set maxWorkers to 50% to reduce memory pressure
- Add workerIdleMemoryLimit of 512MB per worker
- Set testTimeout to 30s for slow tests
- Remove NODE_OPTIONS overrides (use Jest config instead)

Fixes worker termination issues in CI while maintaining test reliability

Author: michaeloboyle

.github/workflows/ci.yml

@@ -32,10 +32,10 @@ jobs:
       run: npm run build
 
     - name: Run tests
-      run: NODE_OPTIONS="--max_old_space_size=4096" npm test
+      run: npm test
 
     - name: Check test coverage
-      run: NODE_OPTIONS="--max_old_space_size=4096" npm run test:coverage
+      run: npm run test:coverage
 
     - name: Upload coverage to Codecov
       if: matrix.node-version == '20.x'

jest.config.js

@@ -17,5 +17,8 @@ module.exports = {
     }
   },
   moduleFileExtensions: ['ts', 'js'],
-  verbose: true
+  verbose: true,
+  maxWorkers: '50%',
+  testTimeout: 30000,
+  workerIdleMemoryLimit: '512MB'
 };