chore: set the status to SIGNED.

[Ethnical]

Description

Update the status of base-002-fp-upgrade to SIGNED for now and should be set to EXECUTED after execution.

[Ethnical]

I will close this PR because this is not necessary and the correct flow to change the status to SIGNED should be only for PSPs runbooks.
From this conversation on discord:
Ah interesting. So SIGNED was intended to be a terminal state for things like presigned pause, where we sign the playbook and don't have any immediate plans to execute. For this kind of playbook (sign + execute around the same time) we typically go straight from READY TO SIGN to EXECUTED. The reason being a "terminal status" matters is because we want to use those to determine which tasks to automatically exceute in CI: #337
Mentioning this issue -> #337