Clean GSVA public nomenclature and provenance

[maggiecam]

Summary

• remove internal template provenance and legacy NIDAP labels from the public
  OMIX GSVA README and source-level help
• rename the canonical source to GSVA.R and stable outputs to
  gsva_results.csv and gsva_heatmap.png
• register and link the Code Ocean deployment adapter
• record OMIX module/interface identity in the run summary instead of internal
  template paths and checksums
• add repository-wide contributor and module-contract rules for public module
  naming and provenance

Compatibility

The scientific implementation, methods, parameters, defaults, score-table
contents, and heatmap behavior are unchanged. Output filenames changed, so the
module advances from 0.1.0/interface 1 to 0.2.0/interface 2 while still in
development. The open deployment-adapter PR must be synchronized before it is
merged or released.

This implements the first GSVA phase of #71. The compatibility-aware audit of
older modules remains tracked there.

Validation

• Rscript modules/OMIX-GSVA/tests/test-module-layout.R
• Rscript modules/OMIX-GSVA/tests/test-gsva-cli.R
• Rscript tests/test-monorepo-layout.R
• git diff --check