Fix retention query performance and cleanup scheduling

tests/unit/worker-scheduling.test.ts

@@ -6,6 +6,7 @@ vi.mock('../../src/lib/server/pipeline/beta-runner.js', () => ({ betaTick: vi.fn
 vi.mock('../../src/lib/server/maintenance/index.js', () => ({ runMaintenance: vi.fn() }));
 vi.mock('../../src/lib/server/game-files/index.js', () => ({ cleanupControllerLibraries: vi.fn(async () => {}) }));
 vi.mock('../../src/lib/server/provisioning/worker.js', () => ({ processProvisioning: vi.fn(async () => {}) }));
+vi.mock('../../src/lib/server/retention.js', () => ({ pruneHistory: vi.fn(), pruneSampleHistory: vi.fn() }));
 
 function deferred() {
     let resolve!: () => void;
@@ -31,6 +32,30 @@ async function setup() {
 }
 
 describe('independent provisioning scheduling', () => {
+    it('runs retention at most every five minutes across ticks and explicit kicks', async () => {
+        const s = await setup();
+        const { pruneHistory, pruneSampleHistory } = await import('../../src/lib/server/retention.js');
+        vi.useFakeTimers();
+        try {
+            s.startWorker();
+            expect(pruneHistory).toHaveBeenCalledTimes(1);
+            expect(pruneSampleHistory).toHaveBeenCalledTimes(1);
+            await vi.advanceTimersByTimeAsync(285_000);
+            await s.kick();
+            expect(pruneHistory).toHaveBeenCalledTimes(1);
+            expect(pruneSampleHistory).toHaveBeenCalledTimes(1);
+            await vi.advanceTimersByTimeAsync(15_000);
+            expect(pruneHistory).toHaveBeenCalledTimes(2);
+            expect(pruneSampleHistory).toHaveBeenCalledTimes(2);
+            expect(s.process.mock.calls.length).toBeGreaterThan(2);
+        } finally {
+            s.stopWorker(); s.background.resolve();
+            await vi.advanceTimersByTimeAsync(0);
+            vi.useRealTimers();
+            await vi.waitFor(() => expect(s.workerActivity()).toEqual([]));
+        }
+    });
+
     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');