init commit

shared/metrics-8/src/recorder/void.ts

@@ -0,0 +1,17 @@
+import type { MetricsEventRecorder } from '@jet/engine';
+import type { LintedMetricsEvent } from '@jet/environment/types/metrics';
+import type { Opt } from '@jet/environment/types/optional';
+
+export class VoidEventRecorder implements MetricsEventRecorder {
+    private recorded: number = 0;
+
+    record(_event: LintedMetricsEvent, _topic: Opt<string>): void {
+        this.recorded++;
+    }
+
+    async flush(): Promise<number> {
+        const { recorded } = this;
+        this.recorded = 0;
+        return recorded;
+    }
+}