IMAP4 folder caching

crates/directory/src/core/config.rs

@@ -69,6 +69,8 @@ impl ConfigDirectory for Config {
             stores.get_lookup_store(self, "storage.lookup")?,
         ));
 
+        let todo = "store quota as u64";
+
         for id in self.sub_keys("directory", ".type") {
             if id.ends_with(".columns") || id.ends_with(".attributes") || id.contains(".principals")
             {