Release v0.3 (v0.3) Switch to the latest release

Features:

* Implemented secure entity deletion workflows directly from the frontend, supported by rigorous backend delete_entity endpoints and associated unit tests.
* Integrated comprehensive geo-spatial querying by adding geoproperty parameters to GeoJSON endpoints, significantly enhancing data retrieval capabilities.
* Centralised and deployed identity management by creating token controllers and external identity endpoints, tightly coupled with real role assignment logic in the frontend.
* Overhauled the frontend interface with generic table components, main filter views, user result lists with pagination/sorting, and implemented dynamic locale loading for improved i18n support.
* Ensured reliable infrastructure state by updating JSON-LD context URLs to HTTPS, configuring database migration logs through Alembic, and securing inter-container connectivity for the identity service.
* Refactored the backend structure by grouping GeoJSON parameters, defining constants for repeated literals, and splitting the user-roles controller into distinct service, route, and controller layers to improve maintainability.