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__/setup.js

@@ -1,61 +1,2 @@
-const couchdbService = require('../services/couchdbService');
-
-// Setup before all tests
-beforeAll(async () => {
-  // Set test environment variables
-  process.env.JWT_SECRET = 'test-jwt-secret';
-  process.env.NODE_ENV = 'test';
-  process.env.COUCHDB_URL = 'http://localhost:5984';
-  process.env.COUCHDB_DB_NAME = 'test-adopt-a-street';
-
-  // Initialize CouchDB service
-  try {
-    await couchdbService.initialize();
-  } catch (error) {
-    console.warn('CouchDB not available for testing, using mocks');
-  }
-});
-
-// Cleanup after each test
-afterEach(async () => {
-  // Clean up test data if CouchDB is available
-  if (couchdbService.isReady()) {
-    try {
-      const types = ['user', 'street', 'task', 'post', 'event', 'reward', 'report', 'badge', 'user_badge', 'point_transaction'];
-      
-      for (const type of types) {
-        try {
-          const docs = await couchdbService.findByType(type);
-          for (const doc of docs) {
-            await couchdbService.deleteDocument(doc._id, doc._rev);
-          }
-        } catch (error) {
-          // Ignore cleanup errors
-        }
-      }
-    } catch (error) {
-      console.warn('Error cleaning up test data:', error.message);
-    }
-  }
-});
-
-// Cleanup after all tests
-afterAll(async () => {
-  if (couchdbService.isReady()) {
-    try {
-      await couchdbService.shutdown();
-    } catch (error) {
-      console.warn('Error shutting down CouchDB service:', error.message);
-    }
-  }
-});
-
-// Suppress console logs during tests unless there's an error
-global.console = {
-  ...console,
-  log: jest.fn(),
-  debug: jest.fn(),
-  info: jest.fn(),
-  warn: jest.fn(),
-  error: console.error, // Keep error logging
-};
+// This file is kept for backward compatibility but functionality
+// has been moved to jest.setup.js which runs before all tests