* ci(wrangler): add per-env assets blocks so production/staging deploys actually upload

* ci: set CI=true explicitly so wrangler runs in non-interactive mode

Wrangler 4.54.0 detects 'interactive' from process.env and skips the
asset upload phase when isCI is false. GHA's ambient CI env vars
weren't being picked up by wrangler when invoked via 'bun run --bun',
so set CI=true explicitly on the deploy step.

* ci(deps): upgrade wrangler 4.54.0 -> 4.88.0 (fixes silent asset-upload no-op)

* ci: add WRANGLER_LOG=debug to diagnose silent wrangler exit in CI

* ci: switch worker deploy to cloudflare/wrangler-action@v3