test(api): add resetDb helper + per-test isolation (proof: sessions suite)

apps/api/test/sessions.test.ts

@@ -1,13 +1,15 @@
-import { describe, it, expect } from 'vitest';
+import { describe, it, expect, beforeEach } from 'vitest';
 import { createApp } from '../src/app';
 import { db } from '../src/db/client';
 import { workSessions } from '../src/db/schema';
 import { eq } from 'drizzle-orm';
-import { authToken, bearer, seedActivity } from './helpers';
+import { authToken, bearer, seedActivity, resetDb } from './helpers';
 
 const json = { 'content-type': 'application/json' };
 
 describe('session lifecycle', () => {
+  beforeEach(resetDb);
+
   it('401s start/stop/discard without a token', async () => {
     const app = createApp();
 
@@ -334,6 +336,8 @@ describe('session lifecycle', () => {
 });
 
 describe('session reads', () => {
+  beforeEach(resetDb);
+
   it('401s GET /api/sessions and /api/sessions/active without a token', async () => {
     const app = createApp();