remove k8s configs, update worker for multi-languages support, add local-submit option

src/LiquidCode.Tester.Worker/Services/CallbackService.cs

@@ -17,6 +17,13 @@ public class CallbackService : ICallbackService
 
     public async Task SendStatusAsync(string callbackUrl, TesterResponseModel response)
     {
+        // Check if callback should be logged instead of sent via HTTP
+        if (IsLogCallback(callbackUrl))
+        {
+            LogCallback(response);
+            return;
+        }
+
         _logger.LogInformation("Sending status update to {CallbackUrl} for submit {SubmitId}", callbackUrl, response.SubmitId);
 
         try
@@ -36,4 +43,37 @@ public class CallbackService : ICallbackService
             // Don't throw - callback failures shouldn't stop testing
         }
     }
+
+    private bool IsLogCallback(string callbackUrl)
+    {
+        if (string.IsNullOrWhiteSpace(callbackUrl))
+        {
+            return false;
+        }
+
+        var normalized = callbackUrl.Trim().ToLowerInvariant();
+        return normalized == "log" ||
+               normalized == "console" ||
+               normalized.StartsWith("log://");
+    }
+
+    private void LogCallback(TesterResponseModel response)
+    {
+        var options = new JsonSerializerOptions
+        {
+            WriteIndented = true,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+        };
+
+        var json = JsonSerializer.Serialize(response, options);
+
+        _logger.LogInformation(
+            "\n" +
+            "╔═══════════════════════════════════════════════════════════════╗\n" +
+            "║                    CALLBACK RESULT                            ║\n" +
+            "╠═══════════════════════════════════════════════════════════════╣\n" +
+            "{Json}\n" +
+            "╚═══════════════════════════════════════════════════════════════╝",
+            json);
+    }
 }