Fix integration test failures related to mocks and DB disconnects

Author: Peolite001

backend/tests/integration/admin-metrics.test.ts

@@ -71,6 +71,7 @@ vi.mock('../../src/lib/redis.js', () => ({
 vi.mock('../../src/lib/prisma.js', () => ({
   default: mocks.prisma,
   prisma: mocks.prisma,
+  pool: { totalCount: 0, idleCount: 0, waitingCount: 0 },
 }));
 
 vi.mock('../../src/middleware/auth.js', async () => {

backend/tests/integration/stream-lifecycle.test.ts

@@ -229,6 +229,9 @@ describe("Stream Lifecycle Integration Tests", () => {
       });
     }
     await cleanupDatabase();
+  });
+
+  afterAll(async () => {
     await testPrisma.$disconnect();
   });
 

backend/tests/integration/streams/withdraw.test.ts

@@ -15,6 +15,7 @@ const {
     },
     streamEvent: {
       create: vi.fn(),
+      upsert: vi.fn(),
     },
   },
   currentUser: { publicKey: '' },
@@ -116,9 +117,9 @@ describe('POST /api/v1/streams/:streamId/withdraw', () => {
     );
 
     // Verify event creation
-    expect(mockPrisma.streamEvent.create).toHaveBeenCalledWith(
+    expect(mockPrisma.streamEvent.upsert).toHaveBeenCalledWith(
       expect.objectContaining({
-        data: expect.objectContaining({
+        create: expect.objectContaining({
           eventType: 'WITHDRAWN',
           streamId: BigInt(streamId),
           transactionHash: 'withdraw-tx-hash',