API: Follow up on adding Variant data type to implement sanitizing for Variant

[aihuaxu]

Feature Request / Improvement

Follow up on #11324 to implement sanitized version of Variant.

Rather than returning the hash of Variant as a string, it should understand the types within the variant and recursively sanitize the fields. Example:

{
   "id": 3,
   "date": "2024-11-05" 
 } 

=>

{
   hash-id: , (1 digit number)
   hash-date: (date-today) 
 } 

Query engine

None

Willingness to contribute

• I can contribute this improvement/feature independently
• I would be willing to contribute this improvement/feature with guidance from the Iceberg community
• I cannot contribute this improvement/feature at this time