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/help.py

@@ -30,6 +30,7 @@ from constant import zhihu as zhihu_constant
 from model.m_zhihu import ZhihuComment, ZhihuContent, ZhihuCreator
 from tools import utils
 from tools.crawler_util import extract_text_from_html
+from tools.user_hash import anonymize_user_id, mask_nickname
 
 ZHIHU_SGIN_JS = None
 
@@ -120,11 +121,8 @@ class ZhihuExtractor:
 
         # extract author info
         author_info = self._extract_content_or_comment_author(answer.get("author"))
-        res.user_id = author_info.user_id
-        res.user_link = author_info.user_link
+        res.creator_hash = author_info.creator_hash
         res.user_nickname = author_info.user_nickname
-        res.user_avatar = author_info.user_avatar
-        res.user_url_token = author_info.url_token
         return res
 
     def _extract_article_content(self, article: Dict) -> ZhihuContent:
@@ -150,11 +148,8 @@ class ZhihuExtractor:
 
         # extract author info
         author_info = self._extract_content_or_comment_author(article.get("author"))
-        res.user_id = author_info.user_id
-        res.user_link = author_info.user_link
+        res.creator_hash = author_info.creator_hash
         res.user_nickname = author_info.user_nickname
-        res.user_avatar = author_info.user_avatar
-        res.user_url_token = author_info.url_token
         return res
 
     def _extract_zvideo_content(self, zvideo: Dict) -> ZhihuContent:
@@ -184,11 +179,8 @@ class ZhihuExtractor:
 
         # extract author info
         author_info = self._extract_content_or_comment_author(zvideo.get("author"))
-        res.user_id = author_info.user_id
-        res.user_link = author_info.user_link
+        res.creator_hash = author_info.creator_hash
         res.user_nickname = author_info.user_nickname
-        res.user_avatar = author_info.user_avatar
-        res.user_url_token = author_info.url_token
         return res
 
     @staticmethod
@@ -207,11 +199,8 @@ class ZhihuExtractor:
                 return res
             if not author.get("id"):
                 author = author.get("member")
-            res.user_id = author.get("id")
-            res.user_link = f"{zhihu_constant.ZHIHU_URL}/people/{author.get('url_token')}"
-            res.user_nickname = author.get("name")
-            res.user_avatar = author.get("avatar_url")
-            res.url_token = author.get("url_token")
+            res.creator_hash = anonymize_user_id(author.get("id"))
+            res.user_nickname = mask_nickname(author.get("name"))
 
         except Exception as e :
             utils.logger.warning(
@@ -253,7 +242,6 @@ class ZhihuExtractor:
         res.parent_comment_id = comment.get("reply_comment_id")
         res.content = extract_text_from_html(comment.get("content"))
         res.publish_time = comment.get("created_time")
-        res.ip_location = self._extract_comment_ip_location(comment.get("comment_tag", []))
         res.sub_comment_count = comment.get("child_comment_count")
         res.like_count = comment.get("like_count") if comment.get("like_count") else 0
         res.dislike_count = comment.get("dislike_count") if comment.get("dislike_count") else 0
@@ -262,10 +250,8 @@ class ZhihuExtractor:
 
         # extract author info
         author_info = self._extract_content_or_comment_author(comment.get("author"))
-        res.user_id = author_info.user_id
-        res.user_link = author_info.user_link
+        res.creator_hash = author_info.creator_hash
         res.user_nickname = author_info.user_nickname
-        res.user_avatar = author_info.user_avatar
         return res
 
     @staticmethod
@@ -352,13 +338,8 @@ class ZhihuExtractor:
             return None
 
         res = ZhihuCreator()
-        res.user_id = creator_info.get("id")
-        res.user_link = f"{zhihu_constant.ZHIHU_URL}/people/{user_url_token}"
-        res.user_nickname = creator_info.get("name")
-        res.user_avatar = creator_info.get("avatarUrl")
-        res.url_token = creator_info.get("urlToken") or user_url_token
-        res.gender = self._foramt_gender_text(creator_info.get("gender"))
-        res.ip_location = creator_info.get("ipInfo")
+        res.creator_hash = anonymize_user_id(creator_info.get("id"))
+        res.user_nickname = mask_nickname(creator_info.get("name"))
         res.follows = creator_info.get("followingCount")
         res.fans = creator_info.get("followerCount")
         res.anwser_count = creator_info.get("answerCount")