Fix deploy to consume Nearby Universe from R2

[alowpoly]

What changed

• stop regenerating Nearby Universe during deploy
• resolve its prepared point and cloud resources from the committed content-addressed R2 inventories
• exercise the production asset-origin build and metadata drift guard in PR CI
• accept valid @2x filenames in the deploy asset-closure verifier

Why

Automatic deploy run 35510300326 failed because build:deploy rewrote committed nearby-universe metadata after PR #426 merged. The payload is already published to R2; deploy should consume that package, not regenerate it.

Validation

• clean production-origin build:deploy completed (995 pages)
• check:deploy-assets verified 3,911 emitted R2 URLs across 1,529 deploy files
• built bundle contains the inventoried nearby-universe points.json and cloud.webp URLs while no local payload was present
• focused Node tests: 18 passed
• typecheck:tools
• typecheck:shell
• git diff --check