feat: fix SHACL discovery and enrich cross-domain references

[jdsika]

Summary

Fix queryDomainReferences to properly discover cross-domain reference relationships from the ontology's nested SHACL structure, and enrich sample scenario data with rich referenced artifacts.

Problem

The queryDomainReferences function used sh:class to discover which domains reference others via manifest:hasReferencedArtifacts. But the actual SHACL uses deeply nested structures (sh:node → sh:or → rdf:list → sh:node → sh:targetClass), so discovery found nothing. This meant cross-domain queries (e.g., "scenarios on motorways with many intersections") could not work.

Additionally, sample data was sparse: only 17/50 scenarios had HD map references, each with just 2 stub properties. No environment model references existed.

Solution

SHACL Discovery Fix (schema-queries.ts)

Multi-strategy approach using separate queries (UNION + property paths crash Oxigraph WASM):

1. Strategy 1 (direct sh:class) — kept for forward compatibility
2. Strategy 2 (nested walk) — sh:node → sh:or → rdf:rest*/rdf:first → sh:node → sh:targetClass
3. Parent resolution — 3 fallback strategies:
   • A: Direct sh:targetClass on constraint shape
   • B: Walk up through sh:and conjunction list
   • C: Walk up through sh:or disjunction list

Result: Discovers scenario → hdmap and scenario → environment-model from the real ontology.

Sample Data Enrichment

• All 50 scenarios now reference HD maps with full properties (format, content with road/lane types, quantity with intersections/signs/speed limits, quality, data source, georeference)
• 20 scenarios additionally reference environment models (format, content, project tools, quantity, quality, georeference)
• All property selection uses generic modular arithmetic over value arrays — no manual mapping tables
• Output path corrected (packages/search/data/ not packages/ontology/data/)

Test Improvements

Strengthened discovery tests from weak if (refs.length > 0) guards to assertive checks that scenario → hdmap and scenario → environment-model are actually discovered.

Files Changed

File	Change
packages/search/src/schema-queries.ts	Fix discovery with multi-strategy SHACL walk
packages/search/src/__tests__/schema-queries.test.ts	Strengthen discovery assertions
scripts/generate-sample-scenarios.js	Full rewrite with rich cross-domain references
packages/search/data/sample-scenarios.ttl	Regenerated (174KB, 50 HD map + 20 env model refs)

Validation

• ✅ 58 tests pass (was 57 — added scenario → environment-model test)
• ✅ TypeScript strict mode clean
• ✅ ESLint clean
• ✅ Prettier formatted
• ✅ pnpm run validate passes