fix(nimble): Improve safety, fix bugs, and update docs across NimBLE examples

- Remove unused headers from examples
- Improve periodic adv/sync example functionality and readability
- Use ble_hs_id_infer_auto() instead of hardcoded BLE_OWN_ADDR_PUBLIC/RANDOM
- Add ble_hs_util_ensure_addr() calls in on_sync for proper address setup
- Use correct ext adv instance (0 instead of 1) in phy_prph, l2cap_coc, multi_conn
- Fix struct name: ble_gap_periodic_adv_enable_params -> ble_gap_periodic_adv_start_params
- Add CONFIG_BT_NIMBLE_GAP_SERVICE guards around ble_svc_gap_device_name_set
- Fix unsafe AD data parsing with bounds checks in central examples
- Fix UUID matching bugs (off-by-one loop condition and byte order) in
  phy_cent, htp_cent, and proximity_sensor_cent
- Fix ble_multi_conn_cent address type to use dynamic inference
- Remove contradictory sm_sc=0 after sm_sc=1 in ble_multi_adv
- Add CONFIG_BT_NIMBLE_EXT_ADV=y to ble_multi_adv sdkconfig defaults
- Check return values for ble_gap_set_host_feat, nimble_port_init
- Update tutorials and READMEs to match code changes

examples/bluetooth/nimble/ble_l2cap_coc/coc_bleprph/main/main.c

@@ -1,10 +1,9 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
 
-#include "esp_log.h"
 #include "nvs_flash.h"
 /* BLE */
 #include "nimble/nimble_port.h"
@@ -80,7 +79,7 @@ ext_bleprph_advertise(void)
 {
     struct ble_gap_ext_adv_params params;
     struct os_mbuf *data;
-    uint8_t instance = 1;
+    uint8_t instance = 0;
     int rc;
 
     /* use defaults for non-set params */
@@ -89,8 +88,8 @@ ext_bleprph_advertise(void)
     /* enable connectable advertising */
     params.connectable = 1;
 
-    /* advertise using random addr */
-    params.own_addr_type = BLE_OWN_ADDR_PUBLIC;
+    /* advertise using the inferred address type */
+    params.own_addr_type = own_addr_type;
 
     params.primary_phy = BLE_HCI_LE_PHY_1M;
     params.secondary_phy = BLE_HCI_LE_PHY_2M;

examples/bluetooth/nimble/ble_l2cap_coc/coc_bleprph/tutorial/coc_bleprph_walkthrough.md

@@ -150,8 +150,8 @@ esp_err_t esp_nimble_init(void)
 ```
 The host is configured by setting up the callbacks for Stack-reset, Stack-sync, and Storage status.
 ```c
-ble_hs_cfg.reset_cb = blecent_on_reset;
-ble_hs_cfg.sync_cb = blecent_on_sync;
+ble_hs_cfg.reset_cb = bleprph_on_reset;
+ble_hs_cfg.sync_cb = bleprph_on_sync;
 ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
 ```
 ## Security Manager Configuration