[FEATURE] Add suport for patient conditions

[RadovanTomik]

Brief description. Load information about a patient's conditions using ICD-10 codes and upload them to the FHIR server. The data model should be compatible with https://simplifier.net/bbmri.de/condition

Desired functionality acceptance criteria

• [x] Load all conditions linked to a patient into the FHIR server and verify they reference the correct patient
• [x] When a new condition is added to the repository it is synced
• [x] Conditions in the FHIR server are never deleted even if no longer present in the repository

[RadovanTomik]

Implementation draft:

Create a custom model for condition with a link to a patient. Periodically go over all conditions in the repository, look if there is a patient with id present in the FHIR store, if no skip, if yes look if condition already exists if not add to bundle and then upload.