feat: enhance image name handling by prepending registry server if missing

Signed-off-by: Christopher Thomsen <christhomsen82@gmail.com>

Author: sikksakk

Services/ContainerExecutor.cs

@@ -103,7 +103,14 @@ public async Task<bool> ExecuteJobAsync(
             try
             {
                 // Parse image name properly - ensure registry server is included
-                var fullImageName = job.ContainerImage;
+                var fullImageName = job.ContainerImage.TrimStart('/');
+                
+                // If registry server is provided and not already in the image name, prepend it
+                if (!string.IsNullOrEmpty(job.RegistryServer) && !fullImageName.StartsWith(job.RegistryServer))
+                {
+                    fullImageName = $"{job.RegistryServer}/{fullImageName}";
+                }
+                
                 string fromImage;
                 string tag;