[Bug]: Comment tree paging: Remove 300-max for top-level comment replies

[dessalines]

Requirements

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Summary

Currently there is a 300 max top-level reply for the comment tree threads, because I don't know how to do paging properly with ltrees. This was added to prevent DB attacks on threads with a lot of comments, but needs a real solution.

Steps to Reproduce

Try to make more than 300 top level comments in a post. It will not show them.

Technical Details

Context: #949

Version

main

Lemmy Instance URL

all