Function storage_get_items 

pub async fn storage_get_items(
    db: State<'_, DatabaseWrapper>,
    server_id: String,
    parent_id: Option<String>,
    library_id: Option<String>,
    item_type: Option<String>,
    limit: Option<i32>,
    offset: Option<i32>,
) -> Result<Vec<CachedItem>, String>

Get cached items with optional filtering