Add biomethods provenance assistant

[haki203]

/claim #13

Summary

• Adds a self-contained biomethods specimen and reagent provenance assistant for issue AI-Assisted Research Tools (MVP Level) #13.
• Checks biospecimen source/context, cell-line authentication and mycoplasma evidence, reagent vendor/catalog/lot/RRID traceability, and reagent batch conflicts.
• Emits deterministic JSON, Markdown, SVG, and MP4 reviewer artifacts from synthetic data only.

Safety

• Synthetic data only.
• No patient data, private lab data, credentials, external APIs, network calls, or payout details.

Validation

• node --test biomethods-provenance-assistant/test.js -> 4 tests passed
• FFMPEG_PATH= node biomethods-provenance-assistant/demo.js -> generated reviewer artifacts and reports/demo.mp4
• node --check biomethods-provenance-assistant/index.js
• node --check biomethods-provenance-assistant/sample-data.js
• node --check biomethods-provenance-assistant/demo.js
• node --check biomethods-provenance-assistant/test.js
• ffmpeg -v error -i biomethods-provenance-assistant/reports/demo.mp4 -f null - -> decoded without errors
• git diff --check
• git diff --cached --check

[haki203]

@algora-pbc /claim #13 #368