AggregateGroupByResult` typed value fields replaced with unified `value` field

The AggregateGroupByResult type no longer exposes separate typed fields for group-by values. The following fields have been removed:

• value_string (String)
• value_int (Int)
• value_float (Float)
• value_boolean (Boolean)

These are replaced by a single unified field:

"""The value of the group by result. Can be an integer, float, string, or boolean."""
value: JSON

If your integration references value_string, value_int, value_float, or value_boolean, you must migrate to the value field and handle type coercion on the client side.