### Config Serving

Config serving is the layer that actually accepts proxy clients, connected over bidirectional gRPC streams, and serve them the required configuration.

We will have two triggers for sending config - requests and pushes.

#### Requests

  // The bookmark will report the ResourceVersion (RV) corresponding to the
  // set of objects, and be marked with `"k8s.io/initial-events-end": "true"` annotation.
  // Afterwards, the watch stream will proceed as usual, sending watch events
  // corresponding to changes (subsequent to the RV) to objects watched.
  //
  // When `sendInitialEvents` option is set, we require `resourceVersionMatch`

  // If the policy specifies a ParamKind and the resource referred to by ParamRef does not exist, this binding is considered mis-configured and the FailurePolicy of the ValidatingAdmissionPolicy applied.
  // +optional
  optional ParamRef paramRef = 2;

  // MatchResources declares what resources match this binding and will be validated by it.