Add CIDOC-CRM path example to RDF mapping doc

[JeroenDeDauw]

Summary

• Add a concrete CIDOC-CRM example (Creator → E22→P108i→E12→P14→E39) to Q4 and the ontology mapping layer section
• Makes the open question tangible for reviewers and illustrates the expressiveness the mapping layer might need

Prompted by discussion with @GeorgeBrusworkin in the ECHOLOT WP3 group chat.
Context: the NeoWiki codebase and RDF mapping planning docs.
_{Written by Claude Code, Opus 4.6}

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com