Initial commit: Complete Software Architecture course with 11 modules

- Added comprehensive course structure with 11 modules
- Included theoretical content, practical examples, and tasks
- Multi-language code examples (Java, Rust, Node.js, Python)
- Detailed analysis of architectural approaches and trade-offs
- Complete caching strategies documentation
- Architecture examples from real-world systems (Twitter, Netflix, Uber)
- Structured navigation and learning path
- Ready for educational use

modules/module4/sections/08-practical-tasks.md

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+# Практические задания
+
+## Навигация
+- [🏠 Главная страница курса](../../../README.md)
+- [📚 Модуль 4](../README.md)
+
+---
+
+### Задание 1: Circuit Breaker
+Реализуйте Circuit Breaker для внешнего сервиса с экспоненциальным backoff.
+
+### Задание 2: Кэширование
+Настройте многоуровневое кэширование (L1: local, L2: Redis).
+
+### Задание 3: Load Balancer
+Создайте простой load balancer с health checks.
+
+---