ETQ Instructeur, je veux que les GeoJSON déposés par les utilisateurs soient valides

[tchak]

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[what-the-diff]

PR Summary

• Enhanced Validation Process
  Improved the validation process in the geographic information service (GeojsonService). This update will now execute a database query if the data in the common structure format (JSON) is valid. This addition can help prevent unnecessary data processing and enhance efficiency.

• Initiated Geospatial Database Functionality
  Added a new update file (migration file) that enables the 'postgis' extension. This extension is important as it significantly improves the ability of our database to handle geographic objects. This means we can now better manipulate, analyze, and store geospatial data.

• Updated Database Structure File
  Made changes to schema.rb (the database structure file) to reflect the addition of the 'postgis' extension. This will ensure coherent representation of the updates across the database.

• Refined Testing Process
  Fixed a minor issue in the geographic area testing file (geo_area_spec.rb) by removing 'skip' from two test cases. This makes the testing process more comprehensive, raising the standard of quality assurance.