// otherwise identical (parallel requests, requests when earlier requests did not modify etc)
  // The UID is meant to track the round trip (request/response) between the KAS and the WebHook, not the user request.
  // It is suitable for correlating log entries between the webhook and apiserver, for either auditing or debugging.
  optional string uid = 1;

// can be used as map keys in json.
message Duration {
  optional int64 duration = 1;
}

// FieldsV1 stores a set of fields in a data structure like a Trie, in JSON format.
//
// Each key is either a '.' representing the field itself, and will always map to an empty set,
// or a string representing a sub-field or item. The string will follow one of these four formats: