jgs-v1-cross-model

Cross-model gap analysis: compare satisfied v1 requirements against element presence in a live v2 model, and surface unsatisfied v1 requirements as traceability gaps. PRO tier (read-only on both bridges). Requires jgs-magic-sysmlv1-mcp AND jgs-magic-sysmlv2-mcp both running. Trigger: "cross-model", "migration progress", "v1 vs v2 gap", "compare v1 and v2", "which requirements are migrated", "traceability gaps between models", "what's left to migrate".