fix(network messages): add limits to rejection message and reason

[oxarbitrage]

Motivation

Zcash limits the rejection message and the reason to specific constants. We want to do similar for Zebra.

Close #4632

Depends-On: #4714

Solution

Add constants and truncate Mesage::Reject::message to MAX_REJECT_MESSAGE_LENGTH and Mesage::Reject::reason to MAX_REJECT_REASON_LENGTH

Review

I think anyone can review, i left some comments with references to zcashd.

Reviewer Checklist

• Code implements Specs and Designs
• Tests for Expected Behaviour
• Tests for Errors

[codecov]

Codecov Report

Merging #4687 (cad038e) into main (d37d8aa) will decrease coverage by 0.11%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #4687      +/-   ##
==========================================
- Coverage   78.93%   78.82%   -0.12%     
==========================================
  Files         304      304              
  Lines       37506    37523      +17     
==========================================
- Hits        29604    29576      -28     
- Misses       7902     7947      +45     

[teor2345]

Looks great!

We could merge this like it is, but it increases the risk of memory denial of service, and there is an easy fix for that.

[teor2345]

Let's merge after the release