DBC22-6513: fix camera list south-to-north highway ordering

[ray-oxd]

📝 Submitter

🔗 JIRA Ticket

• Ticket Link: DBC22-6513

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✅ Quality Assurance & Requirements

• Requirements Met: I have confirmed that all acceptance criteria from the JIRA ticket are fulfilled.
• Tested desktop in local or dev envs
• Tested mobile in local or dev envs
• Ran unit tests locally
• SonarCloud: I have verified that the SonarCloud analysis is clean/passing for this branch.

⚙️ Configuration & Environment

• New Env Variables: No

🧪 How to Test (if required)

1. After deploy, rebuild camera route geometries and orders:
   • python manage.py build_route_geometries (or equivalent task)
   • python manage.py add_camera_orders
2. Open the Camera list page.
3. Check Hwy 19 (and 19A) groupings: cameras should order south → north.
4. Check Hwy 1 still orders west → east and Hwy 97 south → north.
5. Confirm Saved cameras list uses the same within-highway ordering.

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🔍 Reviewer Checklist

• Reviewed code for logic and cleanliness
• Re-tested desktop/mobile in local or dev envs
• Verified no new console warnings/errors
• Confirmed that any new env variables are understood/documented

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