Add knowledge graph claim qualifier guard

[sravan27]

@algora-pbc /claim #17

Summary

• add a focused knowledge-graph claim qualifier guard for Scientific Knowledge Graph Integration
• block causal overclaims from associative evidence, missing negative-result polarity, unsupported recommendation language, and underqualified graph context
• generate deterministic JSON/Markdown/SVG/PNG/MP4 curator proof artifacts from synthetic data

Validation

• node knowledge-graph-claim-qualifier-guard/test.js
• node knowledge-graph-claim-qualifier-guard/demo.js
• node --check knowledge-graph-claim-qualifier-guard/index.js
• node --check knowledge-graph-claim-qualifier-guard/sample-data.js
• node --check knowledge-graph-claim-qualifier-guard/test.js
• node --check knowledge-graph-claim-qualifier-guard/demo.js
• git diff --check
• ffprobe confirms knowledge-graph-claim-qualifier-guard/reports/demo.mp4 is H.264 1280x720, 12 seconds

Notes

• dependency-free core logic
• synthetic data only; no external services or credentials
• distinct from broad extractors/navigators, link audit, ontology drift or alias guards, relationship conflict arbitration, author-affiliation, artifact lineage, evidence freshness, instrument-method compatibility, reproducibility routes, recommendation visibility/diversity, negative-result replication, and measurement harmonization