Simplify architecture: remove overengineering, flatten structure

- Remove dead code: cache.py, context_managers.py, decorators.py, flask-limiter
- Replace AudioSource ABC + FakeFile (5 classes) with 4 plain functions
- Replace TempFileManager class with create_temp_file/cleanup_temp_files functions
- Simplify RequestLogger from 233 to 65 lines, remove file reading side-effect
- Convert HistoryLogger and AudioUtils classes to module-level functions
- Remove unused speed_up_audio and audio_speed_factor config
- Flatten single-file directories: shared/, api/, storage/, validation/, async_tasks/, logging/
- Merge logging config + request_logger into single infrastructure/log.py
- Fix request_logging config key (was request_logger)
- Trim CLAUDE.md to high-level only

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/__init__.py

@@ -12,11 +12,9 @@ import waitress
 
 from .core.transcriber import WhisperTranscriber
 from .core.config import load_config
-from .api.routes import Routes
-from .infrastructure.validation.validators import FileValidator
-from .infrastructure.storage.file_manager import temp_file_manager
-from .infrastructure.logging.config import setup_logging
-from .infrastructure.logging.request_logger import RequestLogger
+from .routes import Routes
+from .infrastructure.validation import FileValidator
+from .infrastructure.log import setup_logging, RequestLogger
 
 
 class WhisperServiceAPI:
@@ -60,7 +58,7 @@ class WhisperServiceAPI:
         self.file_validator = FileValidator(self.config)
         
         # Настройка логирования запросов
-        request_logger_config = self.config.get('request_logger', {})
+        request_logger_config = self.config.get('request_logging', {})
         request_logger = RequestLogger(self.app, request_logger_config)
         
         # Регистрация маршрутов