Fix SPDX profile resolution: split lookup_table onto its own node

[kurtseifried]

Follow-up to #173. The KV upload after that merge failed on one generated fixture, so the live resolver did not pick up either entry.

The failure

FAIL  registry example fixtures > resolves secid:reference/spdx.dev/spdx#ai
AssertionError: expected [ Array(1) ] to include 'https://spdx.github.io/spdx-spec/v3.0.1/model/AI/AI/'

The profile node accepted both spellings the source uses — the capitalised model/documentation path (AI) and the lowercase core:ProfileIdentifierType value written into a document's profileConformance field (ai) — and relied on lookup_table taking priority over the {profile} URL template for the lowercase set, as REGISTRY-JSON-FORMAT.md describes.

The deployed resolver builds from the template first, so ai was substituted verbatim and produced .../model/ai/ai/, which does not exist.

The fix

Split into two sibling nodes, matching the shape already proven by weakness/owasp.org:

Node	Pattern	Resolution
Documentation spelling	^(AI|Build|...|Licensing|...)$	{profile} template
ProfileIdentifierType spelling	^(ai|build|...|software)$	lookup_table only, {url, title} values, no template

Patterns stay case-sensitive, so the two are mutually exclusive — verified across all enumerated values. Licensing stays on the capitalised node only: it has a /model/Licensing/ page but is not a ProfileIdentifierType value, so it never appears in profileConformance.

Worth noting the documented precedence rule (lookup_table wins over url on the same node) does not hold in the deployed resolver. This PR routes around it rather than depending on it; whether the resolver or the doc should change is a separate question.

Verification

Rather than guess twice, I regenerated SecID-Service's src/registry.ts from this working tree and ran its suite locally:

• 388/388 pass (was 386 passed / 1 failed), including all 28 spdx.dev and cyclonedx.org fixtures — #ai, #AI, #dataset, #Dataset all resolve to the correct capitalised URL
• check-pattern-breadth.py PASS, no new exceptions
• validate-subtypes.py PASS
• Validates against schemas/registry-namespace.schema.json