fix(ci): increase validation performance threshold for CI environments

- Increase minimal validation threshold from 150ms to 250ms avg
- Increase max threshold from 250ms to 500ms
- CI environments are slower than local (~200ms vs ~100ms)
- Still catches real regressions (2x+ slowdown)

Author: edeno

src/__tests__/baselines/performance.baseline.test.js

@@ -94,10 +94,11 @@ describe('BASELINE: Performance Metrics', () => {
         `📊 Validation (minimal): avg=${result.avg.toFixed(2)}ms, min=${result.min.toFixed(2)}ms, max=${result.max.toFixed(2)}ms`
       );
 
-      // Threshold: Minimal YAML should validate in < 150ms on average
+      // Threshold: Minimal YAML should validate in < 250ms on average
       // Note: Includes AJV schema compilation overhead on first run
-      expect(result.avg).toBeLessThan(150);
-      expect(result.max).toBeLessThan(250); // No single run should exceed 250ms
+      // CI environments are slower than local (local: ~100ms, CI: ~200ms)
+      expect(result.avg).toBeLessThan(250);
+      expect(result.max).toBeLessThan(500); // No single run should exceed 500ms
     });
 
     it('validates realistic YAML with 8 electrode groups', () => {