Add notebook preview integrity gate

[Cosmic-Game-studios]

/claim #14

Summary

• Add a self-contained notebook preview integrity gate for the Scientific Data and Code Hosting layer.
• Audit notebook cells, outputs, artifacts, metadata, and execution environment capture before public preview publication.
• Produce FAIR scoring, DataCite draft metadata, schema.org Dataset metadata, a reviewer packet, and an SVG dashboard.

Demo video

• notebook-preview-integrity-gate/demo-output/notebook-preview-demo.mp4

Validation

• node --check notebook-preview-integrity-gate/index.js
• node --check notebook-preview-integrity-gate/sample-data.js
• node --check notebook-preview-integrity-gate/test.js
• node notebook-preview-integrity-gate/test.js
• node notebook-preview-integrity-gate/demo.js
• git diff --cached --check

Notes

• The module is dependency-free CommonJS and uses synthetic sample data only.
• The included MP4, JSON report, reviewer packet, and SVG dashboard are generated demo artifacts for maintainers to inspect.