Enable the clippy::str_to_string lint

crates/handlers/src/compat/login_sso_complete.rs

@@ -98,7 +98,7 @@ pub async fn get(
     if Utc::now() > login.created_at + Duration::minutes(30) {
         let ctx = ErrorContext::new()
             .with_code("compat_sso_login_expired")
-            .with_description("This login session expired.".to_string());
+            .with_description("This login session expired.".to_owned());
 
         let content = templates.render_error(&ctx).await?;
         return Ok((cookie_jar, Html(content)).into_response());
@@ -163,7 +163,7 @@ pub async fn post(
     if Utc::now() > login.created_at + Duration::minutes(30) {
         let ctx = ErrorContext::new()
             .with_code("compat_sso_login_expired")
-            .with_description("This login session expired.".to_string());
+            .with_description("This login session expired.".to_owned());
 
         let content = templates.render_error(&ctx).await?;
         return Ok((cookie_jar, Html(content)).into_response());

crates/handlers/src/lib.rs

@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #![forbid(unsafe_code)]
-#![deny(clippy::all, rustdoc::broken_intra_doc_links)]
+#![deny(clippy::all, clippy::str_to_string, rustdoc::broken_intra_doc_links)]
 #![warn(clippy::pedantic)]
 #![allow(
     clippy::unused_async // Some axum handlers need that
@@ -267,7 +267,7 @@ async fn test_router(pool: &PgPool) -> Result<Router, anyhow::Error> {
     let url_builder = UrlBuilder::new("https://example.com/".parse()?);
 
     let matrix_config = MatrixConfig {
-        homeserver: "example.com".to_string(),
+        homeserver: "example.com".to_owned(),
     };
 
     let policy_factory = PolicyFactory::load_default(serde_json::json!({})).await?;

crates/handlers/src/oauth2/discovery.rs

@@ -117,15 +117,15 @@ pub(crate) async fn get(
     let claim_types_supported = Some(vec![ClaimType::Normal]);
 
     let claims_supported = Some(vec![
-        "iss".to_string(),
-        "sub".to_string(),
-        "aud".to_string(),
-        "iat".to_string(),
-        "exp".to_string(),
-        "nonce".to_string(),
-        "auth_time".to_string(),
-        "at_hash".to_string(),
-        "c_hash".to_string(),
+        "iss".to_owned(),
+        "sub".to_owned(),
+        "aud".to_owned(),
+        "iat".to_owned(),
+        "exp".to_owned(),
+        "nonce".to_owned(),
+        "auth_time".to_owned(),
+        "at_hash".to_owned(),
+        "c_hash".to_owned(),
     ]);
 
     let claims_parameter_supported = Some(false);

crates/handlers/src/oauth2/registration.rs

@@ -93,7 +93,7 @@ impl IntoResponse for RouteError {
                 (
                     StatusCode::UNAUTHORIZED,
                     Json(PolicyError::new(
-                        "invalid_client_metadata".to_string(),
+                        "invalid_client_metadata".to_owned(),
                         joined,
                     )),
                 )