discrepancy in the handling of the ownerID in the API

Issue Summary

API can be used to search or filter results of work item by specific attribute. One of them is the Owner of the item, seen as ownerID
It appears that there is a discrepancy in the handling of the ownerID in the API, where it requires integer of string depending of the item schema

Steps to Reproduce

Test purpose : Search a work item based on the ownerID (=UID)

1. Search a Goal based on a specific user ID
   ex: https://alignsupport.jiraalign.com/rest/align/api/2/Goals?filter= ownerId eq 661692
   notice that the search is using an integer
2. Same search and query, but for Stories
   https://alignsupport.jiraalign.com/rest/align/api/2/Stories?filter= ownerId eq 661692
   an error 400 is thrown.
   Cannot find stories. A binary operator with incompatible types was detected. Found operand types 'Edm.String' and 'Edm.Int32' for operator kind 'Equal'.
    To fix the issue the attribute must be changed to a string
   https://alignsupport.jiraalign.com/rest/align/api/2/Stories?filter= ownerId eq '661692'

Expected Results

• All fields for ownerID should have the same requirements
• ownerID should be using UID (string) as some existing customer do have their user's UID as alphanumerical character instead of integer

Actual Results

According to the schemas, the following discrepancy could be found
Here is the list I could retrieve (which could be non exhaustive)

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available