feat(enrichment): render section + analyzerStatus wiring test for new local analyzers

[JSONbored]

Test-only bounty that hardens the REES render/status contract every new analyzer relies on: assert that renderBrief() emits a section for a descriptor that provides an inline render(), falls back to the descriptor-section renderer when it does not, and that analyzerStatus reflects a degraded analyzer. This locks the wiring surface so the many new analyzer PRs land against a tested contract. No runtime change.

Deliverables

• Add review-enrichment/test/render-contract.test.ts (node:test against dist/) exercising renderBrief() with a fixture BriefFindings that includes a descriptor-with-render() analyzer and a descriptor-without-render() analyzer
• Assert the inline render() output appears, the fallback renderDescriptorSection() path is exercised, and an empty finding list produces no section (both branches)
• Assert analyzerStatus surfaces 'degraded'/'partial' for a fixture where an analyzer reports partial
• Keep it pure fixture-driven (no network, no GitHub token); achieve 100% branch coverage of the touched render.ts helper paths

References

• review-enrichment/src/render.ts:15 (renderDescriptorSection) and :24 (renderBrief)
• review-enrichment/test/analyzer-registry.test.ts and review-enrichment/test/analyzer-metadata.test.ts (existing contract tests to sit beside)
• review-enrichment/src/analyzers/registry.ts:36-443 (descriptors with/without render())

Part of #1499.

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size: XS · gittensor:bug

[linear-code]

JSO-2154