feat: Update AI service to use new Google Generative AI SDK

- Refactored AIService to integrate with the latest GoogleGenAI SDK, updating the generateContent method signature and response handling.
- Adjusted error handling and logging for improved clarity and consistency.
- Enhanced mock implementations in tests to align with the new SDK structure.
refactor: Modify Admin DB service to use Profile type
- Updated AdminRepository to replace User type with Profile in relevant methods.
- Enhanced test cases to utilize mock factories for creating Profile and AdminUserView objects.
fix: Improve error handling in BudgetRepository
- Implemented type-safe checks for PostgreSQL error codes to enhance error handling in createBudget method.
test: Refactor Deals DB tests for type safety
- Updated DealsRepository tests to use Pool type for mock instances, ensuring type safety.
chore: Add new mock factories for testing
- Introduced mock factories for UserWithPasswordHash, Profile, WatchedItemDeal, LeaderboardUser, and UnmatchedFlyerItem to streamline test data creation.
style: Clean up queue service tests
- Refactored queue service tests to improve readability and maintainability, including better handling of mock worker instances.
docs: Update types to include UserWithPasswordHash
- Added UserWithPasswordHash interface to types for better clarity on user authentication data structure.
chore: Remove deprecated Google AI SDK references
- Updated code and documentation to reflect the migration to the new Google Generative AI SDK, removing references to the deprecated SDK.

src/routes/admin.content.routes.test.ts

@@ -1,9 +1,9 @@
 // src/routes/admin.content.routes.test.ts
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 import supertest from 'supertest';
-import express, { Request, Response, NextFunction } from 'express';
-import adminRouter from './admin.routes';
-import { createMockUserProfile, createMockSuggestedCorrection, createMockBrand, createMockRecipe, createMockRecipeComment, createMockFlyerItem } from '../tests/utils/mockFactories';
+import { Request, Response, NextFunction } from 'express';
+import adminRouter from './admin.routes'; // This was a duplicate, fixed.
+import { createMockUserProfile, createMockSuggestedCorrection, createMockBrand, createMockRecipe, createMockRecipeComment, createMockUnmatchedFlyerItem } from '../tests/utils/mockFactories';
 import { SuggestedCorrection, Brand, UserProfile, UnmatchedFlyerItem } from '../types';
 import { NotFoundError } from '../services/db/errors.db';
 import { mockLogger } from '../tests/utils/mockLogger';
@@ -235,15 +235,7 @@ describe('Admin Content Management Routes (/api/admin)', () => {
   describe('Unmatched Items Route', () => {
     it('GET /unmatched-items should return a list of unmatched items', async () => {
       // Correctly create a mock for UnmatchedFlyerItem.
-      // It's a combination of a flyer item and some context, including the 'flyer_item_name'.
-      const mockFlyerItem = createMockFlyerItem({ flyer_item_id: 101, item: 'Mystery Item' });
-      const mockUnmatchedItems: UnmatchedFlyerItem[] = [{
-        ...mockFlyerItem,
-        unmatched_flyer_item_id: 1,
-        status: 'pending',
-        store_name: 'Test Store',
-        flyer_item_name: mockFlyerItem.item, // Add the missing required property
-      }];
+      const mockUnmatchedItems: UnmatchedFlyerItem[] = [createMockUnmatchedFlyerItem({ unmatched_flyer_item_id: 1, flyer_item_name: 'Mystery Item' })];
       vi.mocked(mockedDb.adminRepo.getUnmatchedFlyerItems).mockResolvedValue(mockUnmatchedItems);
       const response = await supertest(app).get('/api/admin/unmatched-items');
       expect(response.status).toBe(200);