[web-db] add table and operations for redux-persist engine
Summary:
Supporting operations for custom storage-engine
NOTE: There is a code repetition between this and metadata because both are basically operations on a key-value table. Creating a task to unify this as a follow-up.
NOTE: D7121 is not landed yet, and even so, my local environment is the only place where this code was executed so adding this without migration.
Depends on D7182
Test Plan: Run tests D7184
Reviewers: michal, tomek, marcin, ashoat
Reviewed By: ashoat
Subscribers: ashoat, atul
Differential Revision: https://phab.comm.dev/D7183