Make Artifact suggestions explicit and bounded, align Related Cases with shared table layouts, and update the marketplace skills contract.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Replace case merge with typed weak relationships and shared-artifact suggestions for analysts and agents.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>