AWS Lambda beta 04 makes searcher lambda throw a "route not found" error

[bjernie]

So I am currently working on this issue (#4431) using this as a template. I got it up and running and everything worked like it was supposed to.

I then tried to use the Lambda beta 04 instead of beta 01 that is used in the example. Using that makes the searcher lambda throw this error:

INFO searcher request: quickwit_lambda::searcher::api: new request method="POST" route="/" request_id="3790f8ef-2edb-44f5-89b0-fbe041a790b7"

ERROR searcher request: quickwit_lambda::searcher::api: request rejected rejection=Rejection(NotFound) request_id="3790f8ef-2edb-44f5-89b0-fbe041a790b7"

INFO searcher request: quickwit_lambda::searcher::api: request completed status="404" request_id="3790f8ef-2edb-44f5-89b0-fbe041a790b7"

I tried to add route, which would use the search route, to the input payload like the following (I remade the test CLI in go):

payload, err := json.Marshal(map[string]interface{}{
		"headers": map[string]string{
			"Content-Type": "application/json",
		},
		"requestContext": map[string]interface{}{
			"http": map[string]string{
				"method": "POST",
				"route":  "/api/v1/hdfs-logs/search",
			},
		},
		"body":            jsonQuery,
		"isBase64Encoded": false,
	})

In the logs the route is still set as route="/"

Does anybody know how to make the lambda beta 04 work?