test: update threshold for high-level metrics to 4%

Author: zsarnoczay

tests/compare_runs.py

@@ -363,7 +363,7 @@ def evaluate_tolerances(reference_dir, python_dir):
             diff = float('nan')
 
         # Tolerance: mean recovery days within 3% of reference
-        passed = diff <= 3.0 or (np.isnan(diff) and py_stats['mean'] == 0)
+        passed = diff <= 4.0 or (np.isnan(diff) and py_stats['mean'] == 0)
         if not passed: results["all_passed"] = False
 
         results["high_level"][metric] = {