Follows architecture rule: Pydantic schemas belong in models/schema/ - Moved LetzshopExportRequest to models/schema/vendor.py - Added LetzshopExportFileInfo and LetzshopExportResponse schemas - Updated API endpoint to use proper response_model - Removed inline BaseModel import from API file 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>