feat: OTA über HTTP mit Trailer-Prüfung

src/sys/nl_fwup_hook.h

@@ -6,7 +6,8 @@
 
 /* Called by the SDK updater (sdk/Platform/Common/fwup/wm_fwup.c) after the image CRC
  * matched. sha256 covers the T_BOOTER header plus payload, tail is the 512 byte block
- * appended to the image. Return true to accept the image. */
+ * appended to the image. Return true to accept the image.
+ * Strong definition: src/sys/nl_ota.c (checks the trailer via nl_trailer_verify()). */
 bool nl_fwup_verify_tail(const uint8_t sha256[32], const uint8_t *tail, uint32_t tail_len);
 
 #endif