feat(esp_image_verify): split image verification out of bootloader_support

components/esp_partition/include/esp_private/esp_partition_utils.h

@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+
+#include "esp_partition.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Find the APP partition containing the currently executing firmware.
+ *
+ * Private helper shared by esp_partition and app_update; application code
+ * should prefer esp_ota_get_running_partition() (app_update). The result is
+ * cached after the first lookup.
+ *
+ * @return Running APP partition
+ */
+const esp_partition_t *esp_partition_get_running_partition(void);
+
+#ifdef __cplusplus
+}
+#endif