Changes to Return the data for all LineItems

added the optional property data/items/allOf[subschema #2]/activity/rate_table_lineage to the response with the 200 status

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

added the new FixedFee enum value to the data/items/allOf[subschema #2]/activity/type response property for the response status 200

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

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

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