Feature-complete: tomopy/tomocupy numeric port (analytic + iterative recon,
preprocessing, center finding, vector tomography, beam hardening, SIFT), CUDA
backend (device-resident FBP/fourierrec, cuFFT gridrec/lprec/phase, elementwise),
M5 chunked + out-of-core streaming. Consolidated into one crates.io crate.
Known gap: GPU stripe (CPU-only by design).