fix: Validate InvolvedObject name before API call

Fixes #10

- Add validation to check if reference.Name is empty before attempting
  Kubernetes API call in GetObjectMetadata
- Return empty ObjectMetadata{} without error when name is empty
- Prevents "name is required" errors from flooding logs
- Allows events with empty InvolvedObject names to be processed normally
  without metadata enrichment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Luis Rodríguez

pkg/kube/objects.go

@@ -57,6 +57,11 @@ func (o *ObjectMetadataCache) GetObjectMetadata(reference *v1.ObjectReference, c
 		}
 	}
 
+	// If name is empty, we cannot fetch metadata from API
+	if reference.Name == "" {
+		return ObjectMetadata{}, nil
+	}
+
 	var group, version string
 	s := strings.Split(reference.APIVersion, "/")
 	if len(s) == 1 {