* secure the `EditPost` API endpoint
* Check user is moderator in BanFromCommunity
* secure the `EditComment` API endpoint
* pass orig `read` prob when not explicitly updating it.
* Block random users from adding mods.
* use cleaner logic from `EditPost`
* prevent editing a community by a mod from transfering ownership to them
* secure `read` action in `EditPrivateMessage`
* Add check in UserMention
* only let the indended recipient mark as read
* simplify booleans to satisfy clippy
* requested changes + cargo +nightly fmt
* fix to pass federation tests for deleting comments and posts
Co-authored-by: chiminh <chiminh.tutanota.com>
Co-authored-by: Hex Bear <buildadangtrain@protonmail.com>
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