ENH: Covariance CPU SPMD support#3507

Draft

DDJHB wants to merge 3 commits intouxlfoundation:mainfrom

DDJHB:dev_cov_cpu_spmd

Commits on Feb 5, 2026

feat: base cov spmd impl
DDJHB
committed

Commits on Feb 9, 2026

Merge branch 'main' into dev_cov_cpu_spmd
DDJHB
committed

Commits on Feb 11, 2026

feat: cpu spmd cov samples mpi/ccl
DDJHB
committed