Fix clippy warnings: remove unused async and format code

- Remove async from update_health_metrics since it doesn't await
- Remove .await from call site in alive handler
- Add clippy allow attributes for Rocket handler
- Apply rustfmt formatting

src/api/identity.rs

@@ -30,9 +30,9 @@ use crate::{
         DbConn,
     },
     error::MapResult,
-    mail, sso,
+    mail, metrics, sso,
     sso::{OIDCCode, OIDCCodeChallenge, OIDCCodeVerifier, OIDCState},
-    util, CONFIG, metrics,
+    util, CONFIG,
 };
 
 pub fn routes() -> Vec<Route> {
@@ -106,7 +106,11 @@ async fn login(
     };
 
     // Record authentication metrics
-    let auth_status = if login_result.is_ok() { "success" } else { "failed" };
+    let auth_status = if login_result.is_ok() {
+        "success"
+    } else {
+        "failed"
+    };
     metrics::increment_auth_attempts(&auth_method, auth_status);
 
     if let Some(user_id) = user_id {

src/api/metrics.rs

@@ -103,7 +103,7 @@ async fn get_metrics(_token: MetricsToken, mut conn: DbConn) -> Result<RawText<S
 
 /// Health check endpoint that also updates some basic metrics
 #[cfg(feature = "enable_metrics")]
-pub async fn update_health_metrics(_conn: &mut DbConn) {
+pub fn update_health_metrics(_conn: &mut DbConn) {
     // Update basic system metrics
     use std::time::SystemTime;
     static START_TIME: std::sync::OnceLock<SystemTime> = std::sync::OnceLock::new();
@@ -117,4 +117,4 @@ pub async fn update_health_metrics(_conn: &mut DbConn) {
 }
 
 #[cfg(not(feature = "enable_metrics"))]
-pub async fn update_health_metrics(_conn: &mut DbConn) {}
+pub fn update_health_metrics(_conn: &mut DbConn) {}

src/api/web.rs

@@ -179,9 +179,10 @@ async fn attachments(cipher_id: CipherId, file_id: AttachmentId, token: String)
 // We use DbConn here to let the alive healthcheck also verify the database connection.
 use crate::db::DbConn;
 #[get("/alive")]
+#[allow(clippy::let_unit_value, clippy::unused_async)]
 async fn alive(mut conn: DbConn) -> Json<String> {
     // Update basic health metrics if metrics are enabled
-    let _ = crate::api::metrics::update_health_metrics(&mut conn).await;
+    crate::api::metrics::update_health_metrics(&mut conn);
     now()
 }
 

src/metrics.rs

@@ -4,14 +4,14 @@
 use once_cell::sync::Lazy;
 #[cfg(feature = "enable_metrics")]
 use prometheus::{
-    register_gauge_vec, register_histogram_vec, register_int_counter_vec, register_int_gauge_vec,
+    register_gauge_vec, register_histogram_vec, register_int_counter_vec, register_int_gauge_vec, Encoder, GaugeVec,
-    Encoder, GaugeVec, HistogramVec, IntCounterVec, IntGaugeVec, TextEncoder,
+    HistogramVec, IntCounterVec, IntGaugeVec, TextEncoder,
 };
 
 use crate::{db::DbConn, error::Error, CONFIG};
-use std::time::SystemTime;
 #[cfg(feature = "enable_metrics")]
 use std::sync::{Arc, RwLock};
+use std::time::SystemTime;
 #[cfg(feature = "enable_metrics")]
 use std::time::UNIX_EPOCH;
 
@@ -138,8 +138,6 @@ pub fn increment_auth_attempts(method: &str, status: &str) {
     AUTH_ATTEMPTS_TOTAL.with_label_values(&[method, status]).inc();
 }
 
-
-
 /// Update active user sessions
 #[cfg(feature = "enable_metrics")]
 pub fn update_user_sessions(user_type: &str, count: i64) {