Add Bounded Ordinary HTTPS Idle Cleanup

src/web_httpd_idle.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+#pragma once
+#include "esp_https_server.h"
+
+/* Serialized web_server lifecycle. Prepare before SSL start; stop must fence
+ * submissions before destroying HTTPD, and retire only after successful stop. */
+esp_err_t web_httpd_idle_prepare(void);
+esp_err_t web_httpd_idle_attach(httpd_handle_t server);
+esp_err_t web_httpd_idle_detach(httpd_handle_t server);
+void web_httpd_idle_stopped(httpd_handle_t server);
+/* Synchronous HTTPD-owner TLS callback, composed with diagnostics by server. */
+void web_httpd_idle_tls(esp_https_server_user_cb_arg_t *arg);