TODO:

• adjust the SQL scripts (create and update) and add a column TENANT_ID_ on ACT_RU_TASK table
• add a field tenantId on entity class
• set the tenant-id on the entity while creating it
• inherit the tenant-id from the process instance / execution
• add a method on the TaskQuery to filter by a tenant-id or a list of tenant-ids (tenant-id of the process definition in ...)
• adjust the REST-API (dto for query request / response)