PUBLISH_OK — MoQT draft-17 §9.12.

The subscriber sends a PUBLISH_OK as the first response message on the bidi stream to acknowledge the successful authorization and acceptance of a PUBLISH message, and establish a subscription.

PUBLISH_OK Message {
  Type (vi64) = 0x1E,
  Length (16),
  Number of Parameters (vi64),
  Parameters (..) ...,
}

Figure 14: MOQT PUBLISH_OK Message

Parameters: The parameters are defined in Section 9.3.

TODO: A similar section to SUBSCRIBE about how the publisher handles a filter that is entirely behind Largest Object or is otherwise invalid.