feat: Safely set last logged account public key using null safety

app/src/main/java/com/rosetta/messenger/database/RosettaDatabase.kt

@@ -9,15 +9,17 @@ import androidx.room.RoomDatabase
     entities = [
         EncryptedAccountEntity::class,
         MessageEntity::class,
-        DialogEntity::class
+        DialogEntity::class,
+        BlacklistEntity::class
     ],
-    version = 2,
+    version = 3,
     exportSchema = false
 )
 abstract class RosettaDatabase : RoomDatabase() {
     abstract fun accountDao(): AccountDao
     abstract fun messageDao(): MessageDao
     abstract fun dialogDao(): DialogDao
+    abstract fun blacklistDao(): BlacklistDao
 
     companion object {
         @Volatile