storage*: Simplify next-page-token computation
The initial computation was bound to how visit id are computed... Which is not good.
Related to T645
Test Plan
tox
Migrated from D3643 (view on Phabricator)
The initial computation was bound to how visit id are computed... Which is not good.
Related to T645
tox
Migrated from D3643 (view on Phabricator)