List webhook delivery logs

The 50 most recent delivery attempts of checkout., deposit. and withdraw.* events to this account's callback URLs, newest first — the audit of what was delivered, retried or failed. Bodies are omitted in the list; fetch one log by id for the payloads. Requires scope merchant_read on the API-key path. (An agent account uses the keypair-signed twin at GET /api/agents/webhook-logs.)