Fix password hash in-flight limiter runtime bug due to improper Extension registration

src/web/login.rs

@@ -46,7 +46,7 @@ pub struct PasswordHashInflightLimiter {
 }
 
 impl PasswordHashInflightLimiter {
-    pub async fn new(limit: usize) -> Self {
+    pub fn new(limit: usize) -> Self {
         Self {
             overall: Semaphore::new(limit),
             per_source_ip: Default::default(),