fix parsing memory sample bake task

bake/async/container/supervisor.rb

@@ -44,7 +44,13 @@ def memory_sample(duration: 10, connection_id:)
 		operation = {do: :memory_sample, duration: duration}
 
 		# Use the forward operation to proxy the request to a worker:
-		return connection.call(do: :forward, operation: operation, connection_id: connection_id)
+		response = connection.call(do: :forward, operation: operation, connection_id: connection_id)
+
+		if response && response.key?(:data)
+			JSON.parse(response[:data], symbolize_names: true)
+		else
+			response
+		end
 	end
 end
 

lib/async/container/supervisor/worker.rb

@@ -117,7 +117,7 @@ def do_memory_sample(call)
 					report = sampler.report
 
 					dump(call) do |file|
-						file.puts(report.to_s)
+						file.puts(report.to_json)
 					end
 				ensure
 					GC.start

test/async/container/supervisor.rb

@@ -117,6 +117,10 @@ def reader_target.dispatch(call); end
 
 			# The result should contain a report
 			expect(result).to have_keys(:data)
+
+			report = JSON.parse(result[:data], symbolize_names: true)
+
+			expect(report).to have_keys(:total_allocated, :total_retained, :aggregates)
 		ensure
 			worker_task&.stop
 		end