Robust diagnostic report: FastMCD
n_samples=500, n_features=4, alpha=0.975
detected_fraction=0.1340, threshold=11.1433
radial_kurtosis=5.2420, qq_tail_deviation=3.8966
condition_number=5.798, max_distance=88.9446
support_fraction=0.8800
effective_support_fraction=0.5040
recommendations:
  - Heavy tails detected: compare FastMCD with RegularizedTyler and inspect QQ diagnostics.
  - Large detected fraction for the chosen alpha: consider threshold="empirical" or set a contamination prior.
  - QQ tail deviation is large: tail behavior is far from Gaussian; use empirical thresholds for anomaly detection.
saved diagnostics to results/use_cases/quality_control
