Prevent map crash by not using strict equality when comparing point coordinates

[jwalgran]

Overview

Points were not being combined into a disambiguation popup and throwing an exception when a precision or rounding error prevented the points from being strictly equal.

Connects #734

Testing Instructions

• Run ./scripts/resetdb
• Run ./scripts/manage dbshell and set the same location for all facilities in VN.

UPDATE api_facility 
SET location = st_geomfromtext('POINT(106.8909948 10.9393085)', 4326) 
WHERE id IN (
  SELECT id 
  FROM api_facility 
  WHERE country_code = 'VN'
);

• Browse http://localhost:6543/?countries=VN
• Click the 97 cluster. Verify that the map component does not crash and a disambiguation popup is displayed.

Checklist

• fixup! commits have been squashed
• CI passes after rebase
• CHANGELOG.md updated with summary of features or fixes, following Keep a Changelog guidelines

[kellyi]

👍

[jwalgran]

Thanks for the review.