fix(core): keep workspace runtime available

backend/test/operator-command.test.ts

@@ -5,6 +5,8 @@ const fakes = vi.hoisted(() => ({
   catalogRepository: { close: vi.fn(async () => {}) },
   createCatalogRepository: vi.fn(),
   runnerConfig: undefined as Record<string, unknown> | undefined,
+  acquireWorkspaceRuntime: vi.fn(),
+  releaseWorkspaceRuntime: vi.fn(),
   run: vi.fn(async () => ({
     code: 0,
     stdout: JSON.stringify({ ok: true }),
@@ -24,6 +26,8 @@ vi.mock("../src/tht/tht-runner.js", () => ({
 
     run = fakes.run;
 
+    acquireWorkspaceRuntime = fakes.acquireWorkspaceRuntime;
+
     withPrincipal() {
       return this;
     }
@@ -67,6 +71,12 @@ beforeEach(() => {
   fakes.createCatalogRepository.mockReset();
   fakes.createCatalogRepository.mockReturnValue(fakes.catalogRepository);
   fakes.run.mockClear();
+  fakes.acquireWorkspaceRuntime.mockReset();
+  fakes.acquireWorkspaceRuntime.mockResolvedValue({
+    path: "/data/workspace-registry/snapshots/runtime/workspace.yaml",
+    release: fakes.releaseWorkspaceRuntime,
+  });
+  fakes.releaseWorkspaceRuntime.mockClear();
   fakes.runnerConfig = undefined;
 });
 
@@ -78,5 +88,13 @@ test("workflow doctor gives schema-v4 runtime rendering a live Catalog repositor
 
   expect(fakes.createCatalogRepository).toHaveBeenCalledWith(config.catalogDatabase);
   expect(fakes.runnerConfig?.catalogRepository).toBe(fakes.catalogRepository);
+  expect(fakes.acquireWorkspaceRuntime).toHaveBeenCalledWith(
+    "/data/workspace-registry/snapshots/revision/workspace.yaml",
+  );
+  expect(fakes.run).toHaveBeenCalledWith(
+    ["doctor", "--json"],
+    "/data/workspace-registry/snapshots/runtime/workspace.yaml",
+  );
+  expect(fakes.releaseWorkspaceRuntime).toHaveBeenCalledOnce();
   expect(fakes.catalogRepository.close).toHaveBeenCalledOnce();
 });