The session deadline after a successful verification, or undefined when verification should not
change it.
Verification only ever extends a deadline that exists: a session with no deadline stays
uncapped, and a verifiedMaxSeconds shorter than what is already granted never pulls a deadline in.
The new deadline is measured from the session's start, so verifiedMaxSeconds means "a verified
session may run this long in total", the same meaning unverifiedMaxSeconds has.
The session deadline after a successful verification, or
undefinedwhen verification should not change it.Verification only ever extends a deadline that exists: a session with no deadline stays uncapped, and a
verifiedMaxSecondsshorter than what is already granted never pulls a deadline in. The new deadline is measured from the session's start, soverifiedMaxSecondsmeans "a verified session may run this long in total", the same meaningunverifiedMaxSecondshas.