feat: complete unified order model integration for Letzshop API

Update API endpoints and schemas to use the unified Order model:
- Update Letzshop order schemas with OrderItem support
- Update API responses to use new field names (external_*, status, etc.)
- Update confirm/reject endpoints to use OrderItem.external_item_id
- Update Letzshop order service for unified Order model queries
- Update documentation to reflect completed implementation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
2025-12-19 21:27:24 +01:00
parent 6a10fbba10
commit c49b80ce41
4 changed files with 530 additions and 533 deletions

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