If a serializable value is provided as a SearchAttribute, serialize it instead of throwing the error: "SearchAttribute values must arrays of strings, numbers, booleans, or Dates. The value * at index 0 is of type object"

[JCMais]

If an object is passed as a SearchAttribute, and it is not a Date, and it has a toJSON method, the toJSONmethod should be called, and only then should the validation happen.

E.g: this allows passing MongoDB ObjectIds as search attributes, as they have a toJSON that serializes to a String.