Cache-first object fetching (#76)

* fix: submillisecond cache hits

* fix: async object loading to hand control back to renderer

* fix: clippy

src-tauri/src/remote/commands.rs

@@ -55,7 +55,7 @@ pub fn fetch_drop_object(path: String) -> Result<Vec<u8>, RemoteAccessError> {
         }
         Err(e) => {
             debug!("{e}");
-            get_cached_object::<&str, Vec<u8>>(&path)
+            get_cached_object::<Vec<u8>>(&path)
         }
     }
 }