Added new duration columns and modified the code according to that

• duration_amount and duration_description have been added as new columns to the main database script. An update script has been created for SREs to update the current database on staging/production environments
• Both new columns have been renamed to durationAmount and durationDescription in all occurrences within the code
• frontend/backend code have been modified according to the new two columns
• Catalog is private right now and we use /instruments to get instrument data when interacting with MPIC where the new columns are included in the response
• /api/v1/instruments response doesn't include the new columns we have added with this MR
• The validator we use in the backend was also updated according to the new field names

I have included the script that updates the database but I have also update the init script. As we are in a early stage, I think we don't need to keep here the update script. Do you agree with removing it from the MR? Should we keep it just for historical reason?