Changes to Return the data for a single Activity

added the optional property data/allOf[subschema #2]/activity_description/all_currencies to the response with the 200 status

added the optional property data/allOf[#/components/schemas/Activity_base]/rate_table_lineage to the response with the 200 status

added the optional property data/allOf[subschema #2]/client_portal/unread_notifiable to the response with the 200 status

added the new FixedFee enum value to the data/allOf[#/components/schemas/Activity_base]/type response property for the response status 200

added the new aggregate_fixed_fees enum value to the data/allOf[subschema #2]/bill/kind response property for the response status 200

added the optional property data/allOf[subschema #2]/bill/effective_bill_template_id to the response with the 200 status

added the optional property data/allOf[subschema #2]/legal_aid_uk_activity/activity_category_id to the response with the 200 status

added the optional property data/allOf[subschema #2]/client_portal/unread to the response with the 200 status