refactor: 教学版移除全平台用户个人信息采集与持久化

- 用户 ID 转为匿名 creator_hash，昵称中间脱敏，IP/头像/主页/签名/性别不再采集
- 覆盖 xhs/weibo/bilibili/douyin/kuaishou/tieba/zhihu 7 个平台
- 删除 7 张 creator 档案 ORM 表，15 张内容/评论表新增 creator_hash 列
- B 站禁用粉丝/关注/联系人列表抓取
- 新增 tools/user_hash.py 与 4 个平台的 mock+SQLite 端到端测试

测试: pytest tests/test_no_user_info.py tests/test_weibo_no_user_info.py tests/test_douyin_no_user_info.py tests/test_kuaishou_no_user_info.py (21 passed)

media_platform/zhihu/core.py

@@ -276,27 +276,26 @@ class ZhihuCrawler(AbstractCrawler):
             utils.logger.info(
                 f"[ZhihuCrawler.get_creators_and_notes] Creator info: {createor_info}"
             )
-            await zhihu_store.save_creator(creator=createor_info)
 
             # By default, only answer information is extracted, uncomment below if articles and videos are needed
 
             # Get all anwser information of the creator
             all_content_list = await self.zhihu_client.get_all_anwser_by_creator(
-                creator=createor_info,
+                url_token=user_url_token,
                 crawl_interval=config.CRAWLER_MAX_SLEEP_SEC,
                 callback=zhihu_store.batch_update_zhihu_contents,
             )
 
             # Get all articles of the creator's contents
             # all_content_list = await self.zhihu_client.get_all_articles_by_creator(
-            #     creator=createor_info,
+            #     url_token=user_url_token,
             #     crawl_interval=config.CRAWLER_MAX_SLEEP_SEC,
             #     callback=zhihu_store.batch_update_zhihu_contents
             # )
 
             # Get all videos of the creator's contents
             # all_content_list = await self.zhihu_client.get_all_videos_by_creator(
-            #     creator=createor_info,
+            #     url_token=user_url_token,
             #     crawl_interval=config.CRAWLER_MAX_SLEEP_SEC,
             #     callback=zhihu_store.batch_update_zhihu_contents
             # )