Socket.IO reconnects through Cloudflare proxy get a new socket.id, causing
the backend to emit job:update to a stale socket that no longer exists. The
PDF viewer modal never opened even though PDFs were saved successfully.
Adds a GET /api/insurance-status/job-status/:jobId endpoint backed by
InProcessQueue.getJob(), and a waitForSeleniumJob() helper on the frontend
that races socket events against HTTP polling every 3s. Whichever resolves
first wins, so local (socket) and external (Cloudflare) both work reliably.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>