Add evidence anchored summarizer

[swhan0329]

/claim #13

Summary

• Adds a self-contained evidence-anchored summarizer module for SCIBASE issue AI-Assisted Research Tools (MVP Level) #13.
• Supports abstract, executive, and layperson summary modes while keeping evidence IDs attached to each output bullet.
• Blocks ready status for unanchored claims or missing evidence references, then emits implications, next steps, and a deterministic evidence digest.
• Includes runnable tests, a demo script, requirements mapping, acceptance notes, SVG preview, and an H.264 demo video.

Scope notes

• This is intentionally scoped to the AI paper summarizer part of the MVP, not a broad AI tool suite.
• The slice focuses on multi-audience paper summaries that stay tied to evidence anchors and fail closed when provenance is missing.
• It avoids citation provenance, ethics/data availability, statistical consistency, methods reproducibility, figure/table auditors, protocol deviation, novelty overlap, and output evidence verifier scopes already represented by other submissions.

Validation

• node evidence-anchored-summarizer/test.js
• node evidence-anchored-summarizer/demo.js
• node --check evidence-anchored-summarizer/index.js
• node --check evidence-anchored-summarizer/test.js
• node --check evidence-anchored-summarizer/demo.js
• ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height -of default=noprint_wrappers=1 evidence-anchored-summarizer/demo.mp4
• git diff --cached --check

Demo video: H.264, 1280x720, 5 seconds.

AI-assisted with Codex, reviewed and locally verified before submission.

[swhan0329]

@algora-pbc /claim #13

[swhan0329]

/claim #13