Rename the Cloudflare Queue

[JSONbored]

Problem: The production job queue carries the old brand name and cannot be renamed in place.

Area: Infra / Cloudflare

Proposal: Create a new queue under the new name, dual-produce/consume during a drain window so no in-flight job is lost, then retire the old queue.

Deliverables:

• New queue live and processing jobs.
• Old queue fully drained and removed.

Acceptance criteria:

• No job is dropped or lost during the transition.
• A test job processes correctly end-to-end on the new queue before the old one is removed.

Test scenarios:

• Confirm the old queue's depth reaches zero before removing it.

Resources:

• The Worker configuration's queue binding.

Boundaries:

• Don't remove the old queue until it's confirmed empty.

---

Part of #4761.

[linear-code]

JSO-3440