- Fixed double .png extension issue in barcode generation
- Added test data file for demonstrating functionality
- Updated gitignore to allow test data while excluding output files
- Comprehensive testing of PDF generation pipeline
- All core features working: barcode generation, PDF creation, data processing
- Added detailed test results documentation
Test summary:
✅ Virtual environment setup
✅ Python dependencies installation
✅ UPC-A barcode generation (3-6KB PNG files)
✅ Professional PDF catalog generation (161KB output)
✅ Markdown formatting and file organization
✅ Error handling and fallbacks
