Add bounded live query cursor continuation

test/query-cursor-validation.test.ts

@@ -0,0 +1,20 @@
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import { loadReaderWorkspace } from "./reader-fixture.js";
+import { compileExecutionPlan } from "../src/execution-world/index.js";
+test("local relationship pages may reuse exactly the confirmed source window", async () => {
+  const workspace = await loadReaderWorkspace((name, text) => {
+    if (name === "queries/replica-inputs.graphql")
+      return text.replace("highlights(all: 1000)", "highlights(first: 10)");
+    if (name === "queries/reader-screen.graphql")
+      return text
+        .replace("ReaderScreen($color: String!)", "ReaderScreen")
+        .replace(
+          "highlights(all: 1000, where: {color: {eq: $color}}, orderBy: [{range: {start: ASC}}])",
+          "highlights(first: 10)",
+        )
+        .replace("_camino { relations { highlights { aggregate { count } } } }", "");
+    return text;
+  });
+  assert.doesNotThrow(() => compileExecutionPlan(workspace));
+});