i18n: translate all Chinese comments, docstrings, and logger messages to English

Comprehensive translation of Chinese text to English across the entire codebase:

- api/: FastAPI server documentation and logger messages
- cache/: Cache abstraction layer comments and docstrings
- database/: Database models and MongoDB store documentation
- media_platform/: All platform crawlers (Bilibili, Douyin, Kuaishou, Tieba, Weibo, Xiaohongshu, Zhihu)
- model/: Data model documentation
- proxy/: Proxy pool and provider documentation
- store/: Data storage layer comments
- tools/: Utility functions and browser automation
- test/: Test file documentation

Preserved: Chinese disclaimer header (lines 10-18) for legal compliance

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cache/cache_factory.py

@@ -20,23 +20,23 @@
 
 # -*- coding: utf-8 -*-
 # @Author  : relakkes@gmail.com
-# @Name    : 程序员阿江-Relakkes
+# @Name    : Programmer AJiang-Relakkes
 # @Time    : 2024/6/2 11:23
 # @Desc    :
 
 
 class CacheFactory:
     """
-    缓存工厂类
+    Cache factory class
     """
 
     @staticmethod
     def create_cache(cache_type: str, *args, **kwargs):
         """
-        创建缓存对象
-        :param cache_type: 缓存类型
-        :param args: 参数
-        :param kwargs: 关键字参数
+        Create cache object
+        :param cache_type: Cache type
+        :param args: Arguments
+        :param kwargs: Keyword arguments
         :return:
         """
         if cache_type == 'memory':