fix: 确保代理数据检索中的URL以http://开头

DB.py

@@ -440,7 +440,10 @@ class DBVidcon:
             proxies = json.loads(list_json_str)
             idx = int(conf_str)
             entry = proxies[idx]
-            return entry.get("data", {}).get(region_code, "")
+            result = entry.get("data", {}).get(region_code, "")
+            if not result.startswith("http://"):
+                result = "http://" + result
+            return result
         except (ValueError, IndexError, KeyError, json.JSONDecodeError):
             return ""