feat: Implement tournament schedule tab and fix E2E tests (#27)

## Summary

This PR implements the tournament schedule tab functionality and fixes all remaining E2E test failures.

### Changes Included

1. **Tournament Schedule Feature**
   - Added tournament schedule page at `/admin/tournaments/[id]/schedule`
   - Implemented "Generate Schedule" button functionality
   - Added schedule generation logic for round-robin tournaments

2. **E2E Test Fixes**
   - Fixed database connection issues in production builds
   - Improved test reliability with better error handling and debugging
   - Updated test infrastructure to use environment variables instead of hardcoded values

3. **CI/CD Updates**
   - Added E2E test job to PR workflow
   - Configured tests to run against development database
   - Moved database password to Gitea secrets

4. **Code Quality**
   - Removed hardcoded passwords from codebase
   - Improved Prisma client configuration
   - Enhanced authentication and navigation components

### Test Results
All 16 E2E test scenarios are now passing:
- Authentication tests: ✅
- Registration tests: ✅
- Tournament schedule tests: ✅
- Player schedule tests: ✅
- Admin navigation tests: ✅

### Database Configuration
- Tests run against `euchre_camp_dev` database
- Production builds use environment variables for database configuration
- Database password stored in Gitea secrets as `DB_PASSWORD`

### CI Pipeline
The PR workflow now includes:
1. Unit tests
2. E2E tests (using production build)
3. Version bump analysis

E2E tests must pass before PR can be merged.

Reviewed-on: #27
Co-authored-by: David Gwilliam <dhgwilliam@gmail.com>
Co-committed-by: David Gwilliam <dhgwilliam@gmail.com>

src/__tests__/unit/player-deduplication.test.ts

@@ -8,8 +8,8 @@ import { describe, test, expect, mock, beforeEach,} from 'bun:test';
 import { prisma } from '@/lib/prisma';
 
 // Create mock functions at module level
-const playerFindFirstMock = mock(() => {});
-const playerCreateMock = mock(() => {});
+const playerFindFirstMock = mock(async (_args: any): Promise<any> => null);
+const playerCreateMock = mock(async (_args: any): Promise<any> => ({}));
 
 // Mock the prisma module
 mock.module('@/lib/prisma', () => ({
@@ -326,10 +326,16 @@ describe('Player Deduplication', () => {
         rating: 0,
       };
 
-      playerFindFirstMock
-        .mockResolvedValueOnce(existingPlayer) // First call for "Emily"
-        .mockResolvedValueOnce(existingPlayer) // Second call for "EMILY"
-        .mockResolvedValueOnce(existingPlayer); // Third call for "  Emily  "
+      // Configure mock to return existing player for these specific calls
+      playerFindFirstMock.mockImplementation(async (args: any) => {
+        if (args.where.normalizedName === 'emily') {
+          return existingPlayer;
+        }
+        if (args.where.normalizedName === 'emily') {
+          return existingPlayer;
+        }
+        return null;
+      });
 
       const result1 = await findOrCreatePlayer('Emily');
       const result2 = await findOrCreatePlayer('EMILY');