Add extra linting (#4977)

* Add extra linting

Added extra linting for some code styles.
Also added the Rust Edition 2024 lints.

Closes #4974

Signed-off-by: BlackDex <black.dex@gmail.com>

* Adjusted according to comments

Signed-off-by: BlackDex <black.dex@gmail.com>

---------

Signed-off-by: BlackDex <black.dex@gmail.com>

src/db/models/emergency_access.rs

@@ -89,7 +89,7 @@ impl EmergencyAccess {
                 Some(user) => user,
                 None => {
                     // remove outstanding invitations which should not exist
-                    let _ = Self::delete_all_by_grantee_email(email, conn).await;
+                    Self::delete_all_by_grantee_email(email, conn).await.ok();
                     return None;
                 }
             }