Added

• Cache v2: bincode serialization + per-file parse cache + mtime fast-path
• L1 in-memory parse cache — zero disk I/O for repeated access within same process
• Cached imports in meta for instant unstable_dependency analysis
• ProjectCache with L1/L2 architecture shared across analyze/layers/deps/calibrate

Changed

• Performance: cha analyze 26x faster on warm cache (87s → 3.3s on 3201 files)
• Performance: cha layers 16x faster (13s → 0.8s)
• Performance: cha deps 14x faster (13s → 0.9s)
• Performance: cha calibrate 22x faster (13s → 0.6s)

Fixed

• O(n²) algorithm in unstable_dependency / compute_afferent replaced with HashMap O(1) lookup
• Findings cache wiped by duplicate ProjectCache::open in post-analysis
• Cache invalidation now includes cha binary version (upgrade = auto-invalidate)
• Skip filter_c_oop_false_positives when no lazy_class/data_class findings exist