Add Bounded Ordinary HTTPS Idle Cleanup

src/web_httpd_adapter.h

@@ -1,6 +1,19 @@
 /* SPDX-License-Identifier: GPL-3.0-only */
 #pragma once
 #include "esp_http_server.h"
+#include <stdint.h>
+
+#define WEB_HTTPD_IDLE_SOCKETS 6U
+#define WEB_HTTPD_IDLE_TIMEOUT_US INT64_C(15000000)
+typedef struct {
+    uint64_t completed;
+    int64_t idle_since_us;
+    int fd;
+    bool observed, shutdown_sent;
+} web_httpd_idle_row_t;
+/* HTTPD-owner work boundary only. TLS create must invalidate reused fd rows. */
+void web_httpd_idle_sweep(httpd_handle_t server,
+                          web_httpd_idle_row_t rows[WEB_HTTPD_IDLE_SOCKETS], int64_t now);
 
 /* HTTPD-owner only, before body reads or any response. Reject duplicate lines,
  * including Cookie, rather than trusting first-match public getters. */