
Stage a GDAL raster as a raw-BSQ cube (.bin + sibling .vrt).
stage_raw_cube.RdReads every band of src and writes garry's raw cube format:
band-sequential f32/f64 planes in a .bin, described by a
VRTRawRasterBand VRT that carries the georeference. Any GDAL
consumer reads the VRT normally; garry's reader recognises the shape
and reads the bin directly, which is many times faster than walking
the tiled GeoTIFF. Use it once on pipeline intermediates that are
read many times (per-year context cubes, prediction stacks).