The user's bank information does not load correctly until the webhook is processed

We don’t display correct routing number, account number, and bank account name in UI when first adding bank account info because the external account has not processed from the webhook yet

Start by tracing the UI flow that displays routing number, account number, and bank account name, then inspect how the webhook updates the external bank account. Reproduce the first-add flow before webhook processing and verify that all three values display correctly after the webhook completes.

Written by the indexing model from the issue text.