CI Artifacts overview

CI Artifacts as a cross-cutting topic - the immutable build outputs that flow through and beyond a pipeline. Covers artifact upload/download between jobs, retention policies, artifact signing and provenance attestation (SLSA), container image publishing, package registry integration (npm, PyPI, Maven, OCI), test-result and code-coverage report archiving, and artifact promotion across environment tiers. Central to traceability in supply-chain security.