fix: only print "Paid" on successful x402 payment response

[Sertug17]

Fixes #129

Previously ows pay request printed "Paid $X via x402" immediately after signing, before checking whether the server accepted the payment. If the server rejected with HTTP 402, the user saw both "Paid" and an error — contradictory and misleading.

Fix

Move the status check before the "Paid" print. Now:

• status < 400 → prints "Paid $X on {network} via {protocol}" as before
• status >= 400 → prints "HTTP {status} — payment rejected by server"

Changes

• ows-cli/src/commands/pay.rs — reorder status check and payment confirmation print

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Note

Low Risk
Low risk: changes only CLI output ordering/wording based on HTTP status, with no effect on payment signing or request execution.

Overview
Adjusts ows pay request output to avoid claiming a payment succeeded when the server returns an error.

The command now checks result.status before printing "Paid" and, on >= 400, prints HTTP {status} (or HTTP {status} — payment rejected by server when a payment was attempted) while still printing the response body.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[Sertug17]

Fixed the Cursor Bugbot finding:

The error branch now distinguishes between a genuine payment rejection
(payment.is_some() → "payment rejected by server") and a plain HTTP
error where no payment flow occurred (payment.is_none() → "HTTP {status}").
Previously a 404 or 500 on the initial request would incorrectly print
"payment rejected by server" even though no payment was attempted.