Add HTTPS scheme validation for REPORTING_URL in traffic-reporting workflow (#471)

* Initial plan

* Add HTTPS scheme validation for REPORTING_URL

Co-authored-by: codemillmatt <2053639+codemillmatt@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: codemillmatt <2053639+codemillmatt@users.noreply.github.com>

Author: Copilot

.github/workflows/traffic-reporting.yml

@@ -65,6 +65,12 @@ jobs:
             exit 1
           fi
           
+          # Validate that REPORTING_URL uses HTTPS
+          if [[ ! "${REPORTING_URL}" =~ ^https:// ]]; then
+            echo "❌ Error: REPORTING_URL must start with https:// to ensure secure transmission of sensitive traffic data."
+            exit 1
+          fi
+          
           # Send POST request with API key header, reading file directly
           HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
             -X POST \