Refactor Post and Post Comment models to strictly use Vision ID string pattern

Updated Post_Base and Post_Comment_Base to ensure integer IDs (post_id, post_comment_id) are explicitly removed during validation to prevent mixed-type ID collisions. This hardens the V3 Vision standard compliance.

app/models/post_comment_models.py

@@ -74,7 +74,7 @@ class Post_Comment_Base(BaseModel):
             values['user_id'] = u_rid
             
         # 2. Prevent "Collision Population"
-        for k in ['id', 'post_id', 'person_id', 'user_id']:
+        for k in ['id', 'post_comment_id', 'post_id', 'person_id', 'user_id']:
             if k in values and not isinstance(values[k], str):
                 del values[k]