新增map绑定转储诊断（dhara_map_find+裸读绑定页）：跨boot对比定界树分歧与数据丢失

Src/freertos.c

@@ -274,6 +274,10 @@ void StartDefaultTask(void *argument)
       nand_ftl_set_tree_probe(0);
       if (hfr != FR_OK) {
           nand_ftl_scan_checks();   /* 诊断：环上 checkpoint 的 epoch 分布 */
+          /* 诊断：本 boot（复位后）树绑定 + 绑定页裸读内容 */
+          nand_ftl_dump_binding(0, "postreset");
+          nand_ftl_dump_binding(15, "postreset");
+          nand_ftl_dump_binding(16, "postreset");
       }
       if (hfr != FR_OK) {
           if (hfr == FR_DENIED || hfr == FR_INVALID_OBJECT ||
@@ -297,6 +301,11 @@ void StartDefaultTask(void *argument)
               nand_ftl_log_state("[after-mkfs]");
               if (fr == FR_OK) {
                   DBG_INFO("[FS] volume reformatted OK");
+                  /* 诊断：重格式化后树绑定 + 绑定页裸读内容（与下次
+                   * boot 的 postreset 对比：地址分歧=树问题，内容变化=数据丢失） */
+                  nand_ftl_dump_binding(0, "fresh");
+                  nand_ftl_dump_binding(15, "fresh");
+                  nand_ftl_dump_binding(16, "fresh");
               } else {
                   DBG_ERROR("[FS] volume repair failed (fr=%d)", (int)fr);
                   syslog_post(SYSLOG_SELFTEST, "storage fault");