- Created IMPORT_GUIDE.md: Complete user guide with step-by-step instructions
* Detailed import order for all 27+ tables
* Troubleshooting guide
* Data validation procedures
* Best practices and performance notes
- Created IMPORT_SYSTEM_SUMMARY.md: Technical implementation summary
* Complete list of all implemented functions (28 import + 7 sync)
* Architecture and data flow diagrams
* Module organization
* Testing status and next steps
* ~3,000 lines of code documented
