Standardize Camino query references and retire live field sidecars

src/capability-model/controllers.ts

@@ -24,7 +24,7 @@ export function validateControllers(
         objects = selected(root?.selection, "objects"),
         entries = selected(objects?.selection, "entries"),
         node = selected(entries?.selection, "node"),
-        qx = selected(node?.selection, "_qx"),
+        qx = selected(node?.selection, "_camino"),
         ref = selected(qx?.selection, "ref");
       const all = objects?.arguments.all;
       if (
@@ -44,7 +44,7 @@ export function validateControllers(
       )
         fail(
           `${path}.registry`,
-          "Controller registry requires a native/portable workspace query over its subject, no variables, and root.objects(all: 1..64).entries.node._qx.ref without aliases or conditional selections",
+          "Controller registry requires a native/portable workspace query over its subject, no variables, and root.objects(all: 1..64).entries.node._camino.ref without aliases or conditional selections",
         );
     }
     const iface = interfaces.find((i) => i.revisionId === controller.subject && !i.template);