simplified change data analysis

[ChaseMillers]

PR Description:

Simplified Table Hierarchy Traversal: Replaced manual parent table traversal and sys_dictionary queries with ServiceNow’s built-in [GlideRecord.getElements() to list all fields (including inherited ones) for a table.

Simplified Field Existence Check: Replaced custom logic with [GlideRecord.isValidField(fieldName)] to check if a field exists in the table or its ancestors.

Optional Table Ancestor Output: Added a check for [SNC.TableEditor.getTableAncestors] to print table ancestors if the API is available.

Removed Redundant Code: Eliminated duplicate and verbose logic for parent/field lookup, making the script more maintainable and idiomatic for ServiceNow developers.

Test:

Pull Request Checklist

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[mskoddow]

Many thanks for considering my suggestions regarding code optimizations in your previous PR (#2497)!

[ChaseMillers]

Many thanks for considering my suggestions regarding code optimizations in your previous PR (#2497)!

Thanks for providing it! have a couple more simplifications coming.