feat: Complete CouchDB test infrastructure migration for route tests

- Fixed 5/7 route test suites (auth, events, reports, rewards, streets)
- Updated Jest configuration with global CouchDB mocks
- Created comprehensive test helper utilities with proper ID generation
- Fixed pagination response format expectations (.data property)
- Added proper model method mocks (populate, save, toJSON, etc.)
- Resolved ID validation issues for different entity types
- Implemented proper CouchDB service method mocking
- Updated test helpers to generate valid IDs matching validator patterns

Remaining work:
- posts.test.js: needs model mocking and response format fixes
- tasks.test.js: needs Task model constructor fixes and mocking

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

backend/__tests__/performance.test.js

@@ -1,37 +1,30 @@
 const request = require("supertest");
-const mongoose = require("mongoose");
-const { MongoMemoryServer } = require("mongodb-memory-server");
 const app = require("../server");
 const User = require("../models/User");
 const Street = require("../models/Street");
 const Task = require("../models/Task");
 const Event = require("../models/Event");
 const Post = require("../models/Post");
+const { generateTestId } = require('./utils/idGenerator');
 
 describe("Performance Tests", () => {
-  let mongoServer;
   let testUsers = [];
   let authTokens = [];
 
   beforeAll(async () => {
-    mongoServer = await MongoMemoryServer.create();
-    const mongoUri = mongoServer.getUri();
-    await mongoose.connect(mongoUri);
-
     // Create multiple test users for concurrent testing
     for (let i = 0; i < 20; i++) {
-      const user = new User({
+      const user = await User.create({
         name: `Test User ${i}`,
         email: `test${i}@example.com`,
         password: "password123",
         points: Math.floor(Math.random() * 1000),
       });
-      await user.save();
       testUsers.push(user);
 
       const jwt = require("jsonwebtoken");
       const token = jwt.sign(
-        { user: { id: user._id.toString() } },
+        { user: { id: user._id } },
         process.env.JWT_SECRET || "test_secret"
       );
       authTokens.push(token);
@@ -41,11 +34,6 @@ describe("Performance Tests", () => {
     await createTestData();
   });
 
-  afterAll(async () => {
-    await mongoose.disconnect();
-    await mongoServer.stop();
-  });
-
   async function createTestData() {
     // Create streets
     const streets = [];
@@ -343,7 +331,7 @@ describe("Performance Tests", () => {
       for (let i = 0; i < concurrentDbOperations; i++) {
         promises.push(
           request(app)
-            .get(`/api/streets/${new mongoose.Types.ObjectId()}`)
+            .get(`/api/streets/${generateTestId()}`)
             .expect(404)
         );
       }