/claim #14

This adds a focused notebook rerun determinism guard for Scientific/Engineering Data & Code Hosting.

Scope:

• checks environment digest coverage
• checks pinned random seeds
• checks raw data and output digests
• blocks output drift from baseline
• blocks numeric drift above tolerance
• blocks missing expected figures
• flags slow reruns and missing provenance bundles
• includes MP4 and GIF demo artifacts for review

Validation run locally:

• node notebook-rerun-determinism-guard/test.js
• node notebook-rerun-determinism-guard/demo.js
• node –check notebook-rerun-determinism-guard/index.js

No live compute, credentials, private data, external APIs, or payment systems are used.