Scope live chat to the current match and save match history

tests/unit/worker-scheduling.test.ts

@@ -7,6 +7,7 @@ vi.mock('../../src/lib/server/maintenance/index.js', () => ({ runMaintenance: vi
 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() }));
+vi.mock('../../src/lib/server/fleet/chat.js', () => ({ collectFleetChat: vi.fn(async () => {}) }));
 
 function deferred() {
     let resolve!: () => void;
@@ -32,6 +33,29 @@ async function setup() {
 }
 
 describe('independent provisioning scheduling', () => {
+    it('collects match chat on worker ticks without overlapping a slow collection', async () => {
+        const s = await setup();
+        const { collectFleetChat } = await import('../../src/lib/server/fleet/chat.js');
+        const collection = deferred();
+        vi.mocked(collectFleetChat).mockImplementationOnce(() => collection.promise);
+        vi.useFakeTimers();
+        try {
+            s.startWorker();
+            expect(collectFleetChat).toHaveBeenCalledTimes(1);
+            await vi.advanceTimersByTimeAsync(30_000);
+            expect(collectFleetChat).toHaveBeenCalledTimes(1);
+            collection.resolve();
+            await vi.advanceTimersByTimeAsync(0);
+            await vi.advanceTimersByTimeAsync(15_000);
+            expect(collectFleetChat).toHaveBeenCalledTimes(2);
+        } finally {
+            s.stopWorker(); collection.resolve(); s.background.resolve();
+            await vi.advanceTimersByTimeAsync(0);
+            vi.useRealTimers();
+            await vi.waitFor(() => expect(s.workerActivity()).toEqual([]));
+        }
+    });
+
     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');