修改了4g分片下载，改了版本号约定 最后数字是模型版本号

ota_manager.py

@@ -770,12 +770,12 @@ class OTAManager:
         # 很多 ML307R 的 MHTTP 对 https 不稳定；对已知域名做降级
 
         if isinstance(url, str) and url.startswith("https://static.shelingxingqiu.com/"):
-            base_url = "https://static.shelingxingqiu.com"
-            # TODO：使用https，看看是否能成功
-            self._is_https = True
+            base_url = "http://static.shelingxingqiu.com"
+            self._is_https = False
         else:
             base_url = f"http://{host}"
             self._is_https = False
+        self.logger.info(f"base_url: {base_url}, self._is_https: {self._is_https}")
         # logger removed - use self.logger instead
 
         def _log(*a):
@@ -1160,8 +1160,8 @@ class OTAManager:
                 self.logger.error(f"[OTA-4G][PWR] before_urc read_failed: {e}")
 
             t_dl0 = time.ticks_ms()
-            success, msg = self.download_file_via_4g(ota_url, downloaded_filename, debug=False)
-            t_dl_cost = time.ticks_diff(t_dl0, time.ticks_ms())
+            success, msg = self.download_file_via_4g(ota_url, downloaded_filename, debug=True)
+            t_dl_cost = time.ticks_diff(time.ticks_ms(), t_dl0)
             self.logger.info(f"[OTA-4G] {msg}")
             self.logger.info(f"[OTA-4G] download_cost_ms={t_dl_cost}")