fix(mu): messages not making it to SU on processes spawned from other processes

[VinceJuliano]

Background

When processes spawn other processes and immediately send them messages, the MU cannot detect that the target is a process and sends the message to arweave, the CU then receives this from the SU, for example https://www.ao.link/#/message/owRdq8EJXTtwKnlS8Yd5iJAlTxiIrGOgI7VUzJ3VDEE

{
"error": "Error Encountered when loading message from Scheduler Unit: 400: {"error":"Message or Process not found"}"
}

Solution

It would be possible in the MU to store freshly spawned ids and then it would know they are a process and not a wallet.