docs: add Related links for discoverability (guard, plugins, research, Space, collection)

README.md

@@ -91,3 +91,12 @@ This mapping does not replace the disclaimers above. HOL publishes this dataset;
 HOL Guard Team. "HOL Plugin Security." 2026. https://huggingface.co/datasets/HashgraphOnline/hol-plugin-security
 
 Also: [hol.org/plugins](https://hol.org/plugins), [runtime benchmark](https://hol.org/guard/research/ai-coding-agent-runtime-security-benchmark), [explorer Space](https://huggingface.co/spaces/HashgraphOnline/hol-plugin-security), [OWASP MCP Top 10](https://hol.org/guard/security/owasp-mcp-top-10), [MCP security hub](https://hol.org/guard/security/mcp), [skills hub](https://hol.org/guard/security/skills), [supply-chain hub](https://hol.org/guard/security/supply-chain), [protect secrets](https://hol.org/guard/guides/protect-secrets-from-ai-coding-agents).
+
+## Related
+
+- Product: [HOL Guard](https://hol.org/guard) (local-first runtime control) · source [hashgraph-online/hol-guard](https://github.com/hashgraph-online/hol-guard)
+- Catalog: [hol.org/plugins](https://hol.org/plugins) · research hub [hol.org/research](https://hol.org/research) (fixture benchmarks and programs; independent validation not claimed)
+- Explorer Space: [HashgraphOnline/hol-plugin-security](https://huggingface.co/spaces/HashgraphOnline/hol-plugin-security)
+- Collection: [HOL Plugin Security](https://huggingface.co/collections/HashgraphOnline/hol-plugin-security-6a84caf1652fd5224cb8db83)
+
+Scan ≠ safety guarantee. Runtime fixtures are modeled. HOL publishes this dataset.