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/migrations/add_site_connectivity_fields.sql

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+-- Add connectivity fields to sites table for site connectivity QC
+-- Run this script against your database to add the required columns
+
+-- Add connectivity_status column (connected/disconnected)
+ALTER TABLE eli_test.sites 
+ADD COLUMN IF NOT EXISTS connectivity_status VARCHAR(20) DEFAULT NULL;
+
+-- Add connectivity_distance column (distance to nearest segment in meters) 
+ALTER TABLE eli_test.sites 
+ADD COLUMN IF NOT EXISTS connectivity_distance FLOAT DEFAULT NULL;
+
+-- Create index for performance on connectivity queries
+CREATE INDEX IF NOT EXISTS idx_sites_connectivity_status 
+ON eli_test.sites(connectivity_status);
+
+-- Optional: Add comments to document the columns
+COMMENT ON COLUMN eli_test.sites.connectivity_status IS 'Site connectivity status: connected/disconnected based on distance to network';
+COMMENT ON COLUMN eli_test.sites.connectivity_distance IS 'Distance in meters to nearest network segment';

oldqc/Backend/migrations/add_site_connectivity_fields.sql:Zone.Identifier

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