Release v3.22.0

chore: Release v3.22.0

Hero Example Achievement:
- data_analysis_combined.py compiles AND runs
- Complex data science scripts now work end-to-end

Bug Fixes:
- DEPYLER-1168: Call-site clone insertion for reused variables
- DEPYLER-1169: List index assignment (vec[i]=x not vec.insert())

Metrics:
- Compile rate: 40.6% (130/320)
- Hero runtime: <10s

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>