[Fix] 14 Add Catalog Metadata Returns No Error

- changed return type of SetMetadataAsync from Task to Task<ActionResult<object>>

src/Nexus/API/v1/CatalogsController.cs

@@ -481,7 +481,7 @@ public Task<ActionResult<CatalogMetadata>>
     /// <param name="metadata">The catalog metadata to set.</param>
     /// <param name="cancellationToken">A token to cancel the current operation.</param>
     [HttpPut("{catalogId}/metadata")]
-    public Task
+    public Task<ActionResult<object>>
         SetMetadataAsync(
             string catalogId,
             [FromBody] CatalogMetadata metadata,