添加加密文本输入提示示例

scripts/encrypt_string.py

@@ -17,6 +17,7 @@ def main() -> int:
         plaintext = sys.argv[1]
     if plaintext is None:
         try:
+            # 示例 postgresql://user:password@host:port/dbname
             plaintext = input("请输入要加密的文本: ")
         except EOFError:
             plaintext = ""