chore: add http2 support with connection tracking and optimize middlewares

src/middleware/api_key.rs

@@ -31,18 +31,14 @@ impl ApiKeyMiddleware {
 
 impl Middleware for ApiKeyMiddleware {
     fn run(&self, req: Request<Incoming>) -> MiddlewareFuture<'_> {
-        let expected_key = self.api_key.clone();
-
         Box::pin(async move {
             match req.headers().get("X-API-Key") {
                 Some(header) => {
-                    if header == expected_key.as_str() {
+                    if header == self.api_key.as_str() {
                         MiddlewareResult::Continue(req)
                     } else {
                         warn!("X-API-Key validation failed for request");
-                        // Return a default unauthorized response if Responder fails
                         let response = Responder::unauthorized().unwrap_or_else(|_| {
-                            // Fallback to a basic unauthorized response
                             Response::builder()
                                 .status(http::StatusCode::UNAUTHORIZED)
                                 .body(http_body_util::Full::new(Bytes::from("Unauthorized")))