- old `accounts` table is moved/mapped to `keypairs` and `keypairs_accounts`
- `keycards` table has foreign key which refers to `keypairs.key_uid`
- `Keypair` introduced as a new type
- api endpoints updated according to this change
This commit renames few api endpoints:
- old `AddMigratedKeyPairOrAddAccountsIfKeyPairIsAdded` renamed to `AddKeycardOrAddAccountsIfKeycardIsAdded`
- old `GetAllMigratedKeyPairs` renamed to `GetAllKnownKeycardsGroupedByKeyUID`
- old `GetMigratedKeyPairByKeyUID` renamed to `GetKeycardByKeyUID`
- old `DeleteKeypair` renamed to `DeleteAllKeycardsWithKeyUID`
Changes applied here introduce backing up keycards data to and fetch them from waku.
Information about received keycards data is sent via `sync.from.waku.keycards` signal.