prom-client Async collect function is not released yet

[todo]

API/src/prom.module.ts

Lines 51 to 56 in e702a08

	// TODO: prom-client Async collect function is not released yet
	// https://github.com/siimon/prom-client/issues/383
	// Once this is released, we should refactor this to module
	for (const entityGauge of entityGauges) {
	const entity = entities.find((_) => _.name === entityGauge[1]);
	entityGauge[0].set(await entity.count());

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This issue was generated by todo based on a TODO comment in e702a08. It's been assigned to @niekcandaele because they committed the code.