Implement user account lockout and multi-method 2FA

- Added TwoFactorAuthService supporting TOTP (Google Authenticator) and email-based 2FA with backup codes
- Implemented 2FA setup, verification, disabling, and regeneration commands with corresponding handlers
- Created new API router and request/response schemas for 2FA endpoints
- Updated LoginUserCommandHandler to integrate 2FA verification and temporary token generation
- Enhanced account lockout mechanism to prevent brute force login attempts
- Added dependency injection for new 2FA handlers and integrated with existing auth flow

Author: qwen-intl

.gitignore

@@ -1,64 +1,23 @@
 ```
-# Python
+*.pyc
 __pycache__/
-*.py[cod]
-*$py.class
-*.so
-.Python
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-*.egg-info/
-.installed.cfg
-*.egg
-MANIFEST
-
-# Virtual environments
-venv/
-ENV/
-env/
-.venv/
-.env/
-
-# IDE
-.vscode/
-.idea/
-*.swp
-*.swo
-
-# Logs
 *.log
-
-# Environment variables
+*.tmp
+*.swp
 .env
 .env.local
-*.env.*
-
-# Coverage reports
+.env.*
+.vscode/
+.idea/
+dist/
+build/
+target/
+.venv/
+venv/
+node_modules/
+.mypy_cache/
+.pytest_cache/
 .coverage
+coverage/
 htmlcov/
-.coverage.*
-.coverage.xml
-coverage.xml
-
-# Testing
-.pytest_cache/
-.mypy_cache/
-
-# Database
-*.sqlite
-*.db
-
-# OS
-.DS_Store
-Thumbs.db
 ```