fix(perf): finalize exact worker capture safely

apps/electron-backend-e2e/src/performance/worker-termination-generation.ts

@@ -0,0 +1,24 @@
+export interface WorkerTerminationGenerationInput {
+    readonly capturedGeneration: number | null;
+    readonly currentGeneration: number;
+    readonly recordGeneration: number | null;
+}
+
+export interface WorkerTerminationGenerationApi {
+    isCurrent(input: WorkerTerminationGenerationInput): boolean;
+}
+
+export function createWorkerTerminationGenerationApi(): WorkerTerminationGenerationApi {
+    const isCaptureGeneration = (value: number | null): value is number =>
+        Number.isSafeInteger(value) && Number(value) > 0;
+
+    return Object.freeze({
+        isCurrent(input: WorkerTerminationGenerationInput): boolean {
+            return (
+                isCaptureGeneration(input.capturedGeneration) &&
+                input.capturedGeneration === input.currentGeneration &&
+                input.capturedGeneration === input.recordGeneration
+            );
+        },
+    });
+}