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__/geospatial.test.js

@@ -1,49 +1,42 @@
 const request = require("supertest");
-const mongoose = require("mongoose");
-const { MongoMemoryServer } = require("mongodb-memory-server");
 const app = require("../server");
 const Street = require("../models/Street");
 const User = require("../models/User");
 const couchdbService = require("../services/couchdbService");
 
 describe("Geospatial Queries", () => {
-  let mongoServer;
   let testUser;
   let authToken;
 
   beforeAll(async () => {
-    mongoServer = await MongoMemoryServer.create();
-    const mongoUri = mongoServer.getUri();
-    await mongoose.connect(mongoUri);
-
     // Initialize CouchDB for testing
     await couchdbService.initialize();
 
     // 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();
     await couchdbService.shutdown();
   });
 
   beforeEach(async () => {
     // Clean up streets before each test
-    await Street.deleteMany({});
+    const streets = await couchdbService.findByType('street');
+    for (const street of streets) {
+      await couchdbService.deleteDocument(street._id, street._rev);
+    }
   });
 
   describe("Street Creation with Coordinates", () => {