Node.js 24 (Krypton) entered Active LTS on 2026-02-09. Update all Dockerfiles, CI pipelines, and engine constraint from node:20-alpine to node:24-alpine. Corrected .trivyignore: tar CVEs come from Next.js 16.1.6 bundled [email protected] (not npm). Orchestrator and API images are clean; web image needs Next.js upstream fix. Fixes #367 Co-Authored-By: Claude Opus 4.6 <[email protected]>