List pagination: implement token expiration

[glimchb]

from https://google.aip.dev/158

Many APIs store page tokens in a database internally.
In this situation, APIs may expire page tokens a reasonable time
after they have been sent, in order not to needlessly store large
amounts of data that is unlikely to be used.
It is not necessary to document this behavior.

Note: While a reasonable time may vary between APIs, a good rule of thumb is three days.

please implement token expiration after reasonable time to avoid internal database explosion