fix: use default httpd socket settings to prevent socket exhaustionfeature/tollgate-core-component

- Remove max_open_sockets=2 override from both httpd servers (use
  ESP-IDF default of 4)
- Increase LWIP_MAX_SOCKETS from 16 to 20 (matching standalone
  tollgate)
- The previous custom tuning (max_open_sockets=2, keep_alive_enable=false,
  linger_timeout=0) caused socket leaks by interfering with ESP-IDF's
  internal session management
- Verified: 50/50 sequential requests pass, full payment flow works

2 files changed, 0 insertions, 2 deletions

diff --git a/main/captive_portal.c b/main/captive_portal.c
index fc21d09..ed14c38 100644
--- a/main/captive_portal.c
+++ b/main/captive_portal.c
@@ -313,7 +313,6 @@ esp_err_t captive_portal_start(const char *ap_ip_str)
     httpd_config_t config = HTTPD_DEFAULT_CONFIG();
     config.stack_size = 16384;
     config.max_uri_handlers = 20;
-    config.max_open_sockets = 2;
     config.uri_match_fn = httpd_uri_match_wildcard;
 
     esp_err_t ret = httpd_start(&s_server, &config);
diff --git a/main/tollgate_api.c b/main/tollgate_api.c
index 9b4612d..71056cf 100644
--- a/main/tollgate_api.c
+++ b/main/tollgate_api.c
@@ -390,7 +390,6 @@ esp_err_t tollgate_api_start(void)
     config.server_port = 2121;
     config.ctrl_port = 32769;
     config.max_uri_handlers = 16;
-    config.max_open_sockets = 2;
     config.stack_size = 16384;
 
     esp_err_t ret = httpd_start(&s_api_server, &config);