deposit.api: Add types to main api
This allows a better readability of the current code. Related to T2223
Test Plan
tox
Migrated from D3980 (view on Phabricator)
staging instance, all data can be removed at all time
This allows a better readability of the current code. Related to T2223
tox
Migrated from D3980 (view on Phabricator)