- Add handleEdit() interactive wizard for modifying existing variants
- Add updateCompositeVariant() to variant-service for partial tier updates
- Route 'edit' subcommand in cliproxy index
- Update help text with edit command documentation
- Export updateCompositeVariant from services index
- Add --composite flag to 'ccs cliproxy variant create'
- Implement selectTierConfig() interactive prompt per tier
- Add default tier selection after all tiers configured
- Display composite label in auth list and variant remove
- Show per-tier details in remove confirmation
- Update help text with --composite usage
Refs #506