v2.6.6 — Fix CNCF Enrichment API

Fix

The CNCF Landscape website (landscape.cncf.io/api/items) migrated to a SPA and no longer returns JSON. The enrichment pipeline now queries the GitHub Search API instead, using official CNCF maturity topics:

• topic:cncf-graduated
• topic:cncf-incubating
• topic:cncf-sandbox

Uses the existing GH_TOKEN auth — no new secrets required.

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