v8: Parameter locking for auto-tune — lock any param to constrain the search

v7: Add auto-tuner — self-supervised param optimization using reconstruction quality

v6: Fix clustering for real music — auto-scale NCC window, n_clusters fallback, better defaults

v5: target cluster range + caching + average linkage — sample_extractor.py

v4: NCC clustering + full params - sample_extractor.py

v3: sample_extractor.py

v2: Update sample_extractor.py