Task: Implement the Globe Box feature

TASK-DESCRIPTION

Implement feature prompts/features/03-globe-box.md (Globe Box) in scripts/globe-box-build.sh plus a Python module scripts/globe_box_build.py that the script drives.

The build renders the Earth’s surface from the ETOPO 2022 source tiles (/datasets/dataset-etopo-2022/, read-only) into three watertight binary-STL pieces (north half, south half, twist-lock cylinder) in dataflow.out/box/ with a manifest, plus a --check validation mode.

TASK-CONTEXT

• The geometry decisions are recorded in documents/05-globe-box-approach.md: 100 mm sea-level globe (radius 50), land relief over the global ETOPO range with flat oceans, two hollow hemisphere halves with flat rims at z = 0, an inner sphere of radius radius_mm - wall_mm with a cylindrical socket (bore) of radius socket_radius_mm for socket_depth_mm, and a hollow twist-lock cylinder with a knurled band whose outer surface mates with the halves’ sockets. Bayonet pins on the cylinder engage L-shaped grooves in the sockets; one twist of the band locks both halves while the relief seam stays aligned (south-half grooves are mirror images).
• The shell script owns the log file and the GDAL VRT over the source tiles; the Python module owns the parameter plan, per-piece sampling (average resampling via osgeo.gdal.Warp), mesh construction, STL writing, manifest, and --check validation.
• The geometry math must be importable without osgeo or numpy (pure Python), so tests/04-globe-box-math.sh stays portable.
• Tests: tool-gated tests/03-globe-box-build.sh (builds the full set at coarse sampling, then validates), portable tests/04-globe-box-math.sh (parameter and mating-geometry invariants).

TASK-FILES

• create scripts/globe-box-build.sh
• create scripts/globe_box_build.py
• create tests/03-globe-box-build.sh
• create tests/04-globe-box-math.sh
• modify Makefile (wire build and check targets)
• modify scripts/site-state-fetch.sh (box piece state keys for the dashboard)
• modify TODO.md (mark the globe-box tasks complete after verification)

TASK-OUTPUT

• Implement the files, then run make build, make check, and make test from the repository root.
• Report the piece counts, sizes, and verification results.