API: New search parameter
The filter parameter is a way to manipulate directly the SQL query. This was useful at the beginning, where the API was quite slow. Since a complete refactor of the API, it is possible to filter against the whole entity object, not only the database columns. Also, the sort mechanism can be redone to cover more use cases.
Since this search method will use the database.entity SQL request and not the database.api request it will NOT be available in v0.2. A new version of the API will be released prior to version 7.0.0. However, this will version is not complete and not wholly documented. This is advanced because of frontend development needs.