feat(core): Updated at core version to 0fe38eac

- fix(ESPAT-2081): Added the deduplication for AT+SYSMFG command
- fix(ESPAT-2065): Fixed a potential wifi connect issue after power on and connect to the AP, which immediately disconnected the Wi-Fi connection

Author: ustccw

components/at/lib/VERSION

@@ -1,6 +1,6 @@
-ESP32:   99bf3cd
-ESP32C3: 99bf3cd
-ESP32C2: 99bf3cd
-ESP32C5: 99bf3cd
-ESP32C6: 99bf3cd
-ESP32S2: 99bf3cd
+ESP32:   0fe38ea
+ESP32C3: 0fe38ea
+ESP32C2: 0fe38ea
+ESP32C5: 0fe38ea
+ESP32C6: 0fe38ea
+ESP32S2: 0fe38ea