model:graph: the model as one graph with the Graph page's queries; 1.1

- services/graph.mjs builds the union graph (elements, connections, decision and registry nodes) from the loaded model
- queries: text, type:, diagram:, decision:, uses:, near:, from: to:, unused, shared, -shared; walks follow connections only
- task model:graph with --query and --links; three suite checks; SKILL.md task row and gotcha

scripts/.scripts/model/lib/--index-api.sh

@@ -8,3 +8,4 @@
 . ./.scripts/model/lib/-model--list.sh
 . ./.scripts/model/lib/-model--scaffold.sh
 . ./.scripts/model/lib/-model--resolve.sh
+. ./.scripts/model/lib/-model--graph.sh