Function holochain::core::check_and_hold_register_agent_activity

pub async fn check_and_hold_register_agent_activity<F>(
    hash: &HeaderHash, 
    workspace: &SysValidationWorkspace, 
    network: HolochainP2pCell, 
    incoming_dht_ops_sender: Option<IncomingDhtOpSender>, 
    f: F
) -> Result<(), SysValidationError> where
    F: FnOnce(&Element) -> Result<(), SysValidationError>, 

If we are not holding this header then retrieve it and send it as a RegisterAgentActivity DhtOp to our incoming_dht_ops_workflow.

Apply a checks callback to the Element.

Additionally sys validation will be triggered to run again if we weren’t holding it.