magpie-security-issue-import-via-forwarder

Optional sub-skill of security-issue-import, security-issue-invalidate, and security-issue-sync that handles the *relay/forwarder* case: a report that did not arrive directly from the reporter but was relayed onto <security-list> by an upstream broker (the ASF security team, a third-party disclosure platform, or an internal SOC). Runs after the parent skill's generic classification cascade, dispatches through…