test(docs): assert getText calls documents.get with refined args

Locks in the new behavior so a future regression that drops the
narrowed field mask or the PREVIEW_WITHOUT_SUGGESTIONS view mode is
caught at PR time rather than only via API errors against real Google
Docs.

Author: allenhutchison

workspace-server/src/__tests__/services/DocsService.test.ts

@@ -465,6 +465,12 @@ describe('DocsService', () => {
 
       const result = await docsService.getText({ documentId: 'test-doc-id' });
 
+      expect(mockDocsAPI.documents.get).toHaveBeenCalledWith({
+        documentId: 'test-doc-id',
+        fields: `title,${TABS_FIELD_MASK}`,
+        includeTabsContent: true,
+        suggestionsViewMode: 'PREVIEW_WITHOUT_SUGGESTIONS',
+      });
       expect(result.content[0].text).toBe('Hello World\n');
     });