Regenerate golden metadata with MPI ON on Phoenix

Golden files were previously generated across different machines
(macOS/gfortran 15 vs Linux/gfortran 12, MPI ON vs OFF). Regenerate
all 25 affected metadata files on a single canonical environment
(Phoenix, gfortran 12.3.0, openmpi 4.1.5, MPI=Yes) for consistency.

Numerical golden.txt values are unchanged — only metadata updated.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sbryngelson