style: cargo fmt — fix all formatting for CI

Ran cargo fmt across entire codebase to pass CI's cargo fmt --check.
No logic changes, only whitespace/formatting.

src/config/schema.rs

@@ -570,10 +570,7 @@ default_temperature = 0.7
         let parsed: ChannelsConfig = toml::from_str(&toml_str).unwrap();
         assert!(parsed.imessage.is_some());
         assert!(parsed.matrix.is_some());
-        assert_eq!(
-            parsed.imessage.unwrap().allowed_contacts,
-            vec!["+1"]
-        );
+        assert_eq!(parsed.imessage.unwrap().allowed_contacts, vec!["+1"]);
         assert_eq!(parsed.matrix.unwrap().homeserver, "https://m.org");
     }