Initial commit - Stage 1 working version

Saving current working state before proceeding to Stage 2.
Includes:
- Backend: Python-based QC validator with shapefile processing
- Frontend: Drag-and-drop file upload interface
- Sample files for testing
- Documentation and revision history

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

Co-Authored-By: Claude <noreply@anthropic.com>

oldqc/Backend/build.bat:Zone.Identifier

@@ -0,0 +1,3 @@
+[ZoneTransfer]
+ZoneId=3
+ReferrerUrl=C:\Users\AlexanderHall\Downloads\Auto_LLD-QC-main.zip