Added

• Language-adaptive thresholds: C/C++ profile with higher defaults (long_method=100, complexity=15, large_file=2000)
• Smart terminal aggregation: findings >5 grouped into summary + top 3 worst, --all flag for full listing
• cha layers command: infer architectural layers from import dependencies
• cha layers --format dot|mermaid|json|plantuml with layered architecture diagram