Enhance application with new features, improved error handling, and performance optimizations. Key updates include: added data validation, retry strategies for HTTP requests, detailed logging, and support for RabbitMQ exports. Updated dependencies and enhanced README documentation for better setup instructions.

env.example

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+# ANCHOR: Environment_Variables_Example
+# Семантика: Пример переменных окружения для конфигурации приложения
+# Скопируйте этот файл в .env и настройте под ваши нужды
+
+# ANCHOR: Database_Settings
+DATABASE_URL=sqlite:///price_parser.db
+
+# ANCHOR: Scraping_Settings
+SCRAPING_DELAY=1.0
+MAX_RETRIES=3
+REQUEST_TIMEOUT=30
+USER_AGENT=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
+
+# ANCHOR: Logging_Settings
+LOG_LEVEL=INFO
+LOG_FORMAT=%(asctime)s - %(name)s - %(levelname)s - %(message)s
+LOG_FILE=logs/price_parser.log
+
+# ANCHOR: RabbitMQ_Settings
+RABBITMQ_HOST=localhost
+RABBITMQ_PORT=5672
+RABBITMQ_USERNAME=guest
+RABBITMQ_PASSWORD=guest
+RABBITMQ_VIRTUAL_HOST=/
+
+# ANCHOR: RabbitMQ_Queue_Settings
+RABBITMQ_PRODUCTS_QUEUE=price_parser.products
+RABBITMQ_LOGS_QUEUE=price_parser.logs
+RABBITMQ_EXCHANGE=price_parser.exchange
+
+# ANCHOR: RabbitMQ_Connection_Settings
+RABBITMQ_CONNECTION_TIMEOUT=30
+RABBITMQ_HEARTBEAT=600
+RABBITMQ_BLOCKED_CONNECTION_TIMEOUT=300
+
+# ANCHOR: Export_Settings
+ENABLE_RABBITMQ_EXPORT=false
+ENABLE_CSV_EXPORT=true
+ENABLE_DATABASE_EXPORT=true
+
+# ANCHOR: Validation_Settings
+VALIDATE_DATA_BEFORE_EXPORT=true