Add debugging info

[oomichi-melco]

No description provided.

[oomichi-melco]

409で失敗している理由は以下の通り

2026-07-08T11:20:24.3688582Z {"caller":"github.com/eclipse-symphony/symphony/api/pkg/apis/v1alpha1/vendors/margo.createErrorResponse2:43","instance":"runnervm5mmn9","level":"error","msg":"err: Device signature already exists, msg: Device onboarding denied","scope":"coa.runtime","time":"2026-07-08T11:19:59.230218428Z","type":"log","ver":"unknown"}