test(server): suites record broadcasts on a FakeRealtimeService instead of mocking src/websocket

A hand-built service gets a FakeRealtimeService where it took a RealtimeService, a Nest testing module overrides the provider, and a suite over buildApp() spies on the container's instance (spyOnRealtime). The 167 vi.mock factories on src/websocket are gone, RealtimeService reads the socket registry in ws-state.ts directly, and the re-export stub src/websocket.ts is deleted. The facade's own suite now checks what reaches a socket instead of which module function it called.

server/tests/integration/plugins/boot-registry-order.test.ts

@@ -28,7 +28,6 @@ vi.mock('../../../src/db/database', async () => {
   const db = createSnapshotTestDb();
   return { db, canAccessTrip: () => undefined };
 });
-vi.mock('../../../src/websocket', () => ({ broadcast: vi.fn(), broadcastToUser: vi.fn() }));
 
 import { db as testDb } from '../../../src/db/database';
 import { UnitOfWork } from '../../../src/nest/database/unit-of-work';

server/tests/integration/plugins/dev-link.test.ts

@@ -18,7 +18,6 @@ import path from 'node:path';
 // (`createSnapshotTestDb` + `createTestOrm`) replaces the old hand-rolled table set,
 // same fix `registry.test.ts` needed.
 import { createSnapshotTestDb } from '../../helpers/db-mock';
-vi.mock('../../../src/websocket', () => ({ broadcast: vi.fn(), broadcastToUser: vi.fn() }));
 
 import { PluginRuntimeService } from '../../../src/nest/plugins/plugin-runtime.service';
 import { createPluginRuntime } from '../../helpers/plugin-host';

server/tests/integration/plugins/plugin-runtime.test.ts

@@ -44,7 +44,6 @@ const { testDb } = vi.hoisted(() => {
 });
 vi.mock('../../../src/db/database', () => ({ db: testDb, canAccessTrip: () => undefined }));
 import { db as dbConn } from '../../../src/db/database';
-vi.mock('../../../src/websocket', () => ({ broadcast: vi.fn(), broadcastToUser: vi.fn() }));
 
 import { PluginRuntimeService, PluginDependencyError } from '../../../src/nest/plugins/plugin-runtime.service';
 import { createPluginRuntime } from '../../helpers/plugin-host';