✨ Challenge retrieve api

DysonNetwork.Sphere/Auth/OpenId/ConnectionController.cs

@@ -355,7 +355,7 @@ public class ConnectionController(
                 connection.Account, 
                 HttpContext, 
                 deviceId ?? string.Empty);
-            return Redirect($"/auth/callback?context={challenge.Id}");
+            return Redirect($"/auth/callback?challenge={challenge.Id}");
         }
 
         // Register new user

DysonNetwork.Sphere/Auth/OpenId/OidcService.cs

@@ -291,6 +291,5 @@ public class OidcCallbackData
     public string Code { get; set; } = "";
     public string IdToken { get; set; } = "";
     public string? State { get; set; }
-    public string? CodeVerifier { get; set; }
     public string? RawData { get; set; }
 }