ExtractIntArrayFromQueryParam returns list of all ids in []int extracted from query param use this method over ExtractIntArrayQueryParam if there is list of query params.

ExtractIntArrayQueryParam don't use this func, doesn't handle all cases to capture query params use ExtractIntArrayFromQueryParam over this func to capture int array from query param.

use of writeJsonRespStructured is preferable.

global response body used across api.