Install webapp counters in the staging webapp/storage

Just to reference that needs to happen some day.

It's only installed in the main one.

Function required for this are packaged within the swh.storage module (and already installed in the staging db). What's missing is actual crons which trigger those count.

The diagram [1] should definitely help for this install.

[1] swh/infra/sysadm-environment#2828 (closed)

Migrated from T2761 (view on Phabricator)

Edited Jan 08, 2023 by Phabricator Migration user

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