Update cmd/os-image-composer/build.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: elvin03

cmd/os-image-composer/build.go

@@ -126,9 +126,9 @@ post:
 	if buildErr == nil {
 		log.Info("image build completed successfully")
 	} else {
-		// log.Errorf("image build failed: %v", buildErr)
 		// Avoid logging the full error chain to prevent potential leakage of sensitive data.
-		log.Error("image build failed")
+		// Log only the error type/category to aid debugging without exposing sensitive details.
+		log.Errorf("image build failed (error type: %T)", buildErr)
 	}
 
 	return buildErr