Lighten library cache reports and heartbeat cleanup

tests/unit/worker-scheduling.test.ts

@@ -31,6 +31,30 @@ async function setup() {
 }
 
 describe('independent provisioning scheduling', () => {
+    it('runs controller library cleanup on worker ticks without overlapping a slow cleanup', async () => {
+        const s = await setup();
+        const { cleanupControllerLibraries } = await import('../../src/lib/server/game-files/index.js');
+        const cleanup = deferred();
+        vi.mocked(cleanupControllerLibraries).mockImplementationOnce(() => cleanup.promise);
+        vi.useFakeTimers();
+        try {
+            s.startWorker();
+            expect(cleanupControllerLibraries).toHaveBeenCalledTimes(1);
+            await vi.advanceTimersByTimeAsync(30_000);
+            expect(cleanupControllerLibraries).toHaveBeenCalledTimes(1);
+            expect(s.process.mock.calls.length).toBeGreaterThan(1);
+            cleanup.resolve();
+            await vi.advanceTimersByTimeAsync(0);
+            await vi.advanceTimersByTimeAsync(15_000);
+            expect(cleanupControllerLibraries).toHaveBeenCalledTimes(2);
+        } finally {
+            s.stopWorker(); cleanup.resolve(); s.background.resolve();
+            await vi.advanceTimersByTimeAsync(0);
+            vi.useRealTimers();
+            await vi.waitFor(() => expect(s.workerActivity()).toEqual([]));
+        }
+    });
+
     it('admits and checks new work while campaign, beta and maintenance observers are still waiting', async () => {
         const s = await setup();
         try {