新增 ForceComplete、UsingExactlyOnce 字段

[hcl00521]

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[wind1719]

新字段未初始化，现有调用会在发请求前崩溃。 configurationToDict() 无条件读取两个新属性 (https://github.com/aliyun/aliyun-log-python-sdk/blob/fdae074dc616c03ebfb37591f9b9526d2dcb2539/aliyun/log/scheduled_sql.py#L88-L89)，但 init() 没有初始化它们
(https://github.com/aliyun/aliyun-log-python-sdk/blob/fdae074dc616c03ebfb37591f9b9526d2dcb2539/aliyun/log/scheduled_sql.py#L49-L66)。因此任何没有同时调用两个新 setter 的旧代码，包括默认构造、只设置其中一个字段，以及从不含新字段的旧字典恢复配置，都会抛出
AttributeError。我已分别复现这三条路径。

建议在构造函数中初始化字段；官方示例响应中 forceComplete 的默认值是 False，可据此初始化 (https://help.aliyun.com/en/sls/developer-reference/get-scheduled-sql)。usingExactlyOnce
也应明确默认值，或未设置时不序列化。同时增加真正的单元测试，覆盖默认、部分设置和旧字典兼容路径。当前 e2e 任务只允许手动触发，PR 的常规 CI 不会执行它
(https://github.com/aliyun/aliyun-log-python-sdk/blob/fdae074dc616c03ebfb37591f9b9526d2dcb2539/.github/workflows/build.yaml#L75-L77)。