Wires the frontend onto the PR1 webhook delivery layer. Adds a Deliveries
section to the autopilot detail page that lists recent deliveries
(queued / dispatched / rejected / ignored / failed) with provider, event,
attempt count, and timestamp. Clicking a row opens a detail dialog with
raw body, headers subset, response body, signature status, and a Replay
button. Replay is disabled client-side for signature-invalid / rejected /
still-queued deliveries to mirror the server's 400.
Backend contract is locked behind a lenient zod schema via
parseWithFallback — unknown future status / signature_status values
degrade to a generic row instead of dropping the whole list.
Co-authored-by: multica-agent <github@multica.ai>