fix(explore): Avoid loading state for disabled attribute queries

Only report attribute loading while a query is actively fetching so
disabled queries do not stay stuck in a pending spinner state.
Add a regression test for the TanStack Query v5 disabled-query case.

Co-Authored-By: GPT-5.4 <noreply@openai.com>
Made-with: Cursor

Author: nsdeschenes

static/app/views/explore/hooks/useTraceItemAttributeKeys.spec.tsx

@@ -352,4 +352,19 @@ describe('useTraceItemAttributeKeys', () => {
       expect(result.current.attributes).toEqual(defaultExpectedAttributes)
     );
   });
+
+  it('does not stay loading when the query is disabled', () => {
+    const {result} = renderHookWithProviders(
+      () =>
+        useTraceItemAttributeKeys({
+          enabled: false,
+          traceItemType: TraceItemDataset.LOGS,
+          type: 'string',
+        }),
+      {organization}
+    );
+
+    expect(result.current.isLoading).toBe(false);
+    expect(result.current.attributes).toBeUndefined();
+  });
 });

static/app/views/explore/hooks/useTraceItemAttributeKeys.tsx

@@ -66,7 +66,7 @@ export function useTraceItemAttributeKeys({
   return {
     attributes: data,
     error,
-    isLoading: isPending || (isFetching && normalizedSearch !== undefined),
+    isLoading: isFetching && (isPending || normalizedSearch !== undefined),
   };
 }