security(event, checksig): validate correction of id.

[kehiy]

with removing new conditions on checksig, you can see new invalid test case will pass the test!

[fiatjaf]

My answers to this on DM:

fiatjaf, [9/11/24 7:12 PM]
the signature is being checked against the correct id already

fiatjaf, [9/11/24 7:12 PM]
what isn't being checked is if the id in the event is the correct id

fiatjaf, [9/11/24 7:12 PM]
but that is checked in other parts of the code

fiatjaf, [9/11/24 7:12 PM]
I didn't want to duplicate the checks

[kehiy]

Thanks.