fix: close task3 qdrant and config validation gaps

backend/test/workspace-runtime-renderer.test.ts

@@ -107,21 +107,18 @@ test("keeps create_if_missing for non-registry runtime renders", () => {
   });
 });
 
-test.each(["session", "maintenance"])(
-  "pure renderer emits require_existing vectors for %s acquisition",
-  (mode) => {
-    const rendered = parse(renderRuntimeConfig(workspaceV3, directBindings, paths, {
-      workspaceId: "psd-clinical", workspaceRevision: "a".repeat(40),
-    }, {}, semanticRuntime));
+test("pure renderer emits require_existing vectors for registry runtime", () => {
+  const rendered = parse(renderRuntimeConfig(workspaceV3, directBindings, paths, {
+    workspaceId: "psd-clinical", workspaceRevision: "a".repeat(40),
+  }, {}, semanticRuntime));
 
-    expect(rendered.vectors).toEqual({
-      type: "qdrant",
-      base_url: "http://qdrant:6333",
-      collection: "psd-clinical",
-      collection_lifecycle: "require_existing",
-    });
-  },
-);
+  expect(rendered.vectors).toEqual({
+    type: "qdrant",
+    base_url: "http://qdrant:6333",
+    collection: "psd-clinical",
+    collection_lifecycle: "require_existing",
+  });
+});
 
 test("pure session and maintenance renders are byte-identical", () => {
   const context = { workspaceId: "psd-clinical", workspaceRevision: "a".repeat(40) };