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__/fileupload.test.js

@@ -1,12 +1,11 @@
 const request = require("supertest");
-const mongoose = require("mongoose");
-const { MongoMemoryServer } = require("mongodb-memory-server");
 const multer = require("multer");
 const cloudinary = require("cloudinary").v2;
 const app = require("../server");
 const User = require("../models/User");
 const Post = require("../models/Post");
 const Report = require("../models/Report");
+const { generateTestId } = require('./utils/idGenerator');
 
 // Mock Cloudinary
 jest.mock("cloudinary", () => ({
@@ -20,15 +19,10 @@ jest.mock("cloudinary", () => ({
 }));
 
 describe("File Upload System", () => {
-  let mongoServer;
   let testUser;
   let authToken;
 
   beforeAll(async () => {
-    mongoServer = await MongoMemoryServer.create();
-    const mongoUri = mongoServer.getUri();
-    await mongoose.connect(mongoUri);
-
     // Configure test Cloudinary settings
     cloudinary.config({
       cloud_name: "test_cloud",
@@ -37,25 +31,21 @@ describe("File Upload System", () => {
     });
 
     // Create test user
-    testUser = new User({
+    testUser = await User.create({
       name: "Test User",
       email: "test@example.com",
       password: "password123",
     });
-    await testUser.save();
 
     // Generate auth token
     const jwt = require("jsonwebtoken");
     authToken = jwt.sign(
-      { user: { id: testUser._id.toString() } },
+      { user: { id: testUser._id } },
       process.env.JWT_SECRET || "test_secret"
     );
   });
 
-  afterAll(async () => {
-    await mongoose.disconnect();
-    await mongoServer.stop();
-  });
+
 
   beforeEach(() => {
     // Reset Cloudinary mocks
@@ -234,7 +224,7 @@ describe("File Upload System", () => {
     let testStreet;
 
     beforeEach(async () => {
-      testStreet = new mongoose.Types.ObjectId();
+      testStreet = generateTestId();
     });
 
     test("should upload report image successfully", async () => {