Feature: Post-Replay state validation

[SakuraIsayeki]

Context

During moderation, a Community Manager has no awareness of posts not meeting guidelines, other than by manual validation.

Problem

A Community Manager should be able to systematically know what posts logically fail to meet guidelines, when applicable. Failing to provide such a system, many posts can fly under the radar, and not be picked up by manual verification.

Solution

Automate and implement post-replay state validation, on all possible aspects.

This encompasses player roster checks, flair checks, and chat checks.
Some of these are already implemented app-side, as visual guides (see posts view for any post with replay attached). The objective now is to further expand this API-side, and implement more extensive automated background checks, performed on any new post uploaded.