misc: Forbid non-ascii identifiers

That prevents a class of unicode attacks, e.g. invisible characters.

app/src/lib.rs

@@ -1,4 +1,5 @@
 #![recursion_limit = "256"]
+#![forbid(non_ascii_idents)]
 #![allow(clippy::nonstandard_macro_braces)]
 pub mod components;
 pub mod infra;

auth/src/lib.rs

@@ -1,3 +1,4 @@
+#![forbid(non_ascii_idents)]
 #![allow(clippy::nonstandard_macro_braces)]
 use chrono::prelude::*;
 use serde::{Deserialize, Serialize};

server/src/main.rs

@@ -1,4 +1,5 @@
 #![forbid(unsafe_code)]
+#![forbid(non_ascii_idents)]
 #![allow(clippy::nonstandard_macro_braces)]
 
 use crate::{