* Removed the 'Exareme' restriction requiring all algorithm names to be in uppercase.

* Fixed a bug in which we incorrectly expected the algorithm parameter to contain the variable "default" instead of "default_value."

* Fixed a bug in which we incorrectly converted incoming str to int.

Major code cleanup.
Renamed AlgorithmDTOs to AlgorithmSpecificationDTO.
Converted all DTOs to records.
Moved Exareme2 specific DTOs to separate folder.
Split the ExperimentDTO used in the request to an ExperimentExecutionDTO.
Logs refactoring.

Converted all DTOs to records, except from CommonDataElement because we need to modify it.
Created a PathologyService and extracted all complexity from the Controller.
Renamed the MetadataHierarchyDTO to PathologyMetadataDTO.
Created a new PathologyMetadataGroupDTO class for the metadata groups. The PathologyMetadataDTO class has more properties now that were not included previously.
Removed the Exareme2AttributesDTO, getting the internal info hardcoded, maybe we should change that in the future.