Make AppState seed deterministic and update migration

Data/AppDbContext.cs

@@ -54,7 +54,7 @@ public class AppDbContext : DbContext
             {
                 Id = 1,
                 CurrentPhase = Phase.Suggest,
-                UpdatedAt = DateTimeOffset.UtcNow
+                UpdatedAt = DateTimeOffset.UnixEpoch
             });
         });
     }