Merge #4041

4041: Register the swap indexe task in a spawn blocking to be sure to never… r=ManyTheFish a=irevoire

# Pull Request

## Related issue
Fixes https://github.com/meilisearch/meilisearch/issues/4040

## What does this PR do?
- Register the swap indexes task in a spawn blocking task

Co-authored-by: Tamo <tamo@meilisearch.com>

meilisearch/src/routes/swap_indexes.rs

@@ -60,8 +60,7 @@ pub async fn swap_indexes(
     }
 
     let task = KindWithContent::IndexSwap { swaps };
-
-    let task = index_scheduler.register(task)?;
-    let task: SummarizedTaskView = task.into();
+    let task: SummarizedTaskView =
+        tokio::task::spawn_blocking(move || index_scheduler.register(task)).await??.into();
     Ok(HttpResponse::Accepted().json(task))
 }