4 tests validating the 51-dim feature extraction pipeline: - DBN data loading (graceful skip if file absent) - Synthetic bars: dimension check (51-dim), no NaN/Inf - Value range bounds (-100 to 100) - Streaming vs batch consistency (element-wise 1e-10 tolerance) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>