Changes to Read minimal cached deployment service readiness

the version response property const value changed from 1 to 2 for the status 200

added the new email_key_verified enum value to the services/items/reason response property for the response status 200

added the new email_sender_unverified enum value to the services/items/reason response property for the response status 200

added the new email_verified enum value to the services/items/reason response property for the response status 200

added the new resume_misconfigured enum value to the services/items/reason response property for the response status 200

added the non-success response with the status 503

removed the non-success response with the status 404

removed the callback_unverified enum value from the services/items/reason response property for the response status 200

removed the delivery_unverified enum value from the services/items/reason response property for the response status 200

removed the durableTurns enum value from the services/items/dependencies/items response property for the response status 200

removed the durableTurns enum value from the services/items/id response property for the response status 200

removed the organization_setup_required enum value from the services/items/reason response property for the response status 200

removed the provider_access_unverified enum value from the services/items/reason response property for the response status 200

removed the slack enum value from the services/items/dependencies/items response property for the response status 200

removed the slack enum value from the services/items/id response property for the response status 200

endpoint added