[BUG] no char limit on comment section leads to super long comment

[Raunaksplanet]

Fider Cloud or Self Hosted
https://create.fider.io/posts/612/value-0d-0ax-injected-20burp-ai-test

Describe the bug
a super long comment with no char limit can be added

To Reproduce
Steps to reproduce the behavior:

1. navigate to self hosted fider instance
2. create a new suggestion
3. enter super long comment
4. observe that a user can add super long comment

Expected behavior
there should be a char limit so a user cant spam

Screenshots
Proof of concept https://create.fider.io/posts/612/value-0d-0ax-injected-20burp-ai-test#comment-52820