feat(web): adminRequests cache key + staleTime polish

- qk.adminRequests defaults to status='all' when no filter is set; the unfiltered
  endpoint returns every status, so caching it as 'pending' was a latent mismatch.
- 60s staleTime on lidarrConfig + myRequests — both are session-stable enough
  that refetching on every consumer-page mount produced needless flicker.

web/src/lib/api/queries.ts

@@ -27,7 +27,7 @@ export const qk = {
   lidarrQualityProfiles: () => ['lidarrQualityProfiles'] as const,
   lidarrRootFolders:     () => ['lidarrRootFolders'] as const,
   adminRequests:         (status?: string) =>
-    ['adminRequests', { status: status ?? 'pending' }] as const,
+    ['adminRequests', { status: status ?? 'all' }] as const,
 };
 
 export function createArtistsQuery(sort: ArtistSort) {