- Add cast import and use for dict.get() results in bottle_state.py
- Fix JSON metadata loading with proper dict type casting
- Apply same pattern to egress_apply.py for YAML routes parsing
- Cast routes list after isinstance check
- Properly type proposed_paths and existing_paths after validation
- Fixes 35 pyright errors across both files
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>