Delete comment refacatoring

[nayan458]

Description

• Move the comment to the archive from the main database.
• Update user statistics if anything is related to it.

[Bavithbabu]

LLD: Delete Comment Archive System

The delete system is designed so that any post/comment deletion follows one reusable flow:

delete request -> shared delete module -> move to archive -> remove from live collection
This avoids writing separate delete logic for user delete, future admin delete, or moderation-based delete.

Main Flow

For comment delete:

User/Admin/Moderation calls delete comment
-> validates permission outside delete module
-> ContentDeleteService.deleteComment(commentId)
-> fetch comment from postdescription
-> save comment into archive_comments
-> delete comment from postdescription

Archive Table for comment:
When a comment is deleted, the comment is moved frompostdescriptiontoarchive_comments.

Field	Example	Purpose
_id	69d9f4a8feb63ab50410e031	New archive document id
originalCommentId	69d9f42afeb63ab50410e030	Original comment id from postdescription
postId	69d9f0b4feb63ab50410e02d	Post where the comment belonged
userId	69d9ed84de89b227fed805dc	Owner of the comment
username	Test User	Comment owner username
userImageUrl	profile image url	User profile image
description	This inscription looks like a 12th century temple wall record.	Comment text
upvote	0	Comment upvote count
status	ACCEPTED	Status at the time of archive
report.count	0	Report count at the time of archive
createdAt	2026-04-11T07:15:20.100Z	Original created date
updatedAt	2026-04-11T07:15:20.100Z	Original updated date