- Ship now starts with cargoHold 0; the bar vignette's DONE press builds
out 4 bays (effects.cargoHold) and then places the special-package,
making the parcel aboard the "cargoUpgraded" step's witness instead of
a build-state check.
- Remove the old capital-landing handoff and SurfaceScene package flag;
onVignetteComplete in GameScene applies effects + handoff in order and
refreshes the quest checklist.
- Persist cargoHold through saves and gate jumps so the upgraded hold and
its goods survive a scene restart or load (old saves fall back to the
carried goods count).
- Add arid-land/takeoff 02 assets, fix landing.json slot 3 mapping, and
extend dev tests (jump-cargo probe, saves round-trip, vignette flow) to
cover the new beat ordering and persistence.
