Include function call stack trace in query error messages
Picture this scenario: you are calling a Kusto function but get a syntax error. But where is the syntax error coming from exactly? The error message doesn't say. You inspect the code for the function only to find references to other functions inside, and the way to know which one of those is the culprit is to run them one by one. And then each of those functions might be calling other functions too!
Wouldn't it be nice if the error message told you the exact function where the error is happening from?