[SQLite] add keyservers table for KeyserverStore data
Summary:
Table to store data from KeyserverStore in SQLite.
Based on types defined in D10755.
Making table key-value (value is keyserver info in JSON) saves some implementation time and makes code more complicated. I discussed this with both @inka and @tomek and this should be enough - there is no need to make more columns (we can always migrate when there is any need).
Test Plan:
- Test migration.
- Logout and test creating database from scratch.
Test on both web (it's visible in worker's logs) and native.
Reviewers: inka, marcin
Reviewed By: inka
Subscribers: ashoat, tomek, inka
Differential Revision: https://phab.comm.dev/D10774