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>

e2e/cucumber/features/user-registration.feature

@@ -9,8 +9,8 @@ Feature: User Registration
   @happy-path @authentication
   Scenario: Successful registration with valid data
     When I fill in "name" with "Test User"
-    And I fill in "email" with "test-user@example.com"
-    And I fill in "password" with "TestPassword123!"
+    And I fill in "email" with the generated unique email
+    And I fill in "password" with "TestPassword1234!"
     And I click the "Create Account" button
     Then I should be redirected to my profile page
     And my user account should exist
@@ -18,8 +18,8 @@ Feature: User Registration
   @happy-path @authentication
   Scenario: Auto-created player profile is linked to user
     When I fill in "name" with "Profile Test User"
-    And I fill in "email" with "profile-test@example.com"
-    And I fill in "password" with "ProfilePass123!"
+    And I fill in "email" with the generated unique email
+    And I fill in "password" with "ProfilePass1234!"
     And I click the "Create Account" button
     Then I should be redirected to my profile page
     And I should see "Welcome, Profile Test User"
@@ -30,14 +30,14 @@ Feature: User Registration
     When I navigate to the registration page
     And I fill in "name" with "Duplicate User"
     And I fill in "email" with the same email
-    And I fill in "password" with "TestPassword123!"
+    And I fill in "password" with "TestPassword1234!"
     And I click the "Create Account" button
     Then I should see a registration error
 
   @negative-test @authentication
   Scenario: Registration with weak password fails
     When I fill in "name" with "Weak Password User"
-    And I fill in "email" with "weak@example.com"
+    And I fill in "email" with the generated unique email
     And I fill in "password" with "weak"
     And I click the "Create Account" button
     Then I should see "password" validation error
@@ -54,6 +54,6 @@ Feature: User Registration
   Scenario: Registration with email verification (placeholder)
     When I fill in "name" with "Email Verify User"
     And I fill in "email" with "verify@example.com"
-    And I fill in "password" with "TestPassword123!"
+    And I fill in "password" with "TestPassword1234!"
     And I click the "Create Account" button
     Then I should see "Please check your email to verify your account"