feat(metrics): add price update delay metric and update method

Author: cctdaniel

apps/price_pusher/src/controller.ts

@@ -71,7 +71,7 @@ export class Controller {
             priceConfig.timeDifference,
           );
         }
-        
+
         const priceShouldUpdate = shouldUpdate(
           priceConfig,
           sourceLatestPrice,

apps/price_pusher/src/metrics.ts

@@ -151,7 +151,9 @@ export class PricePusherMetrics {
   ): void {
     this.priceUpdateDelay.set(
       { price_id: priceId, alias },
-      sourceLatestPricePublishTime - targetLatestPricePublishTime - priceConfigTimeDifference
+      sourceLatestPricePublishTime -
+        targetLatestPricePublishTime -
+        priceConfigTimeDifference,
     );
   }