Refactor and translate comments and docstrings in utility modules to English for better clarity and maintainability. Update Gunicorn and application startup messages for consistency in language. Enhance documentation with English translations for better accessibility.

backend_api_python/app/config/__init__.py

@@ -1,6 +1,6 @@
 """
-配置模块
-统一导出所有配置
+Configuration module
+Export all configurations uniformly
 """
 from app.config.settings import Config
 from app.config.api_keys import APIKeys
@@ -15,17 +15,17 @@ from app.config.data_sources import (
 )
 
 __all__ = [
-    # 主配置
+    # main configuration
     'Config',
     
-    # API 密钥
+    # API key
     'APIKeys',
     
-    # 数据库/缓存
+    # Database/cache
     'RedisConfig',
     'CacheConfig',
     
-    # 数据源
+    # data source
     'DataSourceConfig',
     'FinnhubConfig',
     'TiingoConfig',