Extract ~450 lines of complex bash from action.yaml into modular, unit-tested Node.js scripts in lib/. All logic is covered by 26 native node:test unit tests (node --test, no external dependencies). Modules added: - lib/platforms.js - platform parsing and OCI manifest auto-discovery - lib/distro.js - SPDX PURL distro detection (os_name/os_version) - lib/verifier.js - Trivy arch mapping and SHA256 verification - lib/diagnostics.js - CI terminal diagnostic formatters - lib/install-trivy.js - Trivy install/verify entrypoint (replaces bash step) - lib/extract-sboms.js - SBOM extraction entrypoint (replaces bash step) - lib/scan-sboms.js - SBOM scan + diff entrypoint (replaces bash step) Tests added (all pass, auto-discovered by ode --test): - test/platforms.test.js - test/distro.test.js - test/verifier.test.js - test/diagnostics.test.js - test/orchestration.test.js action.yaml shrinks from 554 to 107 lines. Inputs are bridged to Node scripts via INPUT_* env vars so modules are fully decoupled from the Actions runner and testable in isolation.
