/claim #14

Summary

• add a deterministic scientific artifact hosting readiness checker
• validate upload file types, integrity digests, storage limits, previews, FAIR metadata, access controls, runtime sandboxing, reproducibility triggers, and versioning
• include synthetic JSON, Markdown, SVG, and short MP4 demo artifacts

Tests

• node scientific-data-code-hosting/artifact-hosting-readiness/test.js
• node scientific-data-code-hosting/artifact-hosting-readiness/demo.js
• node scientific-data-code-hosting/artifact-hosting-readiness/make-demo-video.js

All fixtures are synthetic and the module performs no private-file, storage-backend, execution-sandbox, credential, or external API calls.