Implement Studio root and placement capabilities on the replica graph (WI-10)

src/execution-world/execution-groups.ts

@@ -1,3 +1,4 @@
+import { portableReflectionValue } from "./reflection.js";
 import type {
   BoundDependency,
   DependencyBinding,
@@ -152,7 +153,10 @@ export function compileExecutionGroups(
           const target = bound.binding,
             port = entry.dependencyPorts.find((p) => p.id === bound.portId)!;
           if ("via" in target && target.via) storage(target.via.edgeTypeId);
-          if (target.kind === "state") storage(target.slotId);
+          if (target.kind === "reflection") {
+            for (const selector of target.selectors)
+              remember("reflection:" + selector, portableReflectionValue(workspace, selector));
+          } else if (target.kind === "state") storage(target.slotId);
           else if (target.kind === "edge") storage(target.edgeTypeId);
           else if (target.kind === "query") query(target.packageRevisionId, target.queryId);
           else if (target.kind === "interface" && port.requirement.kind === "interface") {