False Positive: "Statement has no effect" on Airflow task chaining with >> operator

**Description of the false positive**

The CodeQL analysis is reporting a "Statement has no effect" false positive when using Apache Airflow's operator chaining syntax with >>. This is a valid and idiomatic way to declare task dependencies in Airflow DAGs, and these statements have clear side effects within the context of Airflow’s task graph construction.

**Code samples or links to source code**
The following is a minimal reproducible example using Apache Airflow:
```python
from airflow import DAG
from airflow.operators.empty import EmptyOperator
from datetime import datetime

with DAG("example_dag", start_date=datetime(2025, 6, 5), schedule_interval=None) as dag:
task_1 = EmptyOperator(task_id="task_1")
task_2 = EmptyOperator(task_id="task_2")
task_3 = EmptyOperator(task_id="task_3")
task_4 = EmptyOperator(task_id="task_4")

task_1 >> task_2 # CodeQL incorrectly flags this
task_2 >> [task_3, task_4] # CodeQL incorrectly flags this too
```

These lines are not no-op statements; they define execution order between tasks (task_1 precedes task_2, etc.). Removing them would break DAG functionality.

**URL to the alert on GitHub code scanning (optional)**
Code is proprietary.

**Suggested solution**
If possible, please provide a way to configure CodeQL to ignore `>>` operator overload on Airflow operator objects, which have intentional and important side effects.. Please note that this operator works only in DAG context manager (`with DAG(...) as dag:`).

If that's not feasible, then I would greatly appreciate help setting up custom CodeQL rule to ignore this false positive.

首先，使用 issue 中的最小 Apache Airflow Python 示例重现该警报。阅读与“Statement has no effect”警报相关的 CodeQL 查询和 Python 建模，然后确定如何分析重载的 >> 表达式。完成的标准是：Airflow 任务链式调用语句不再被报告，同时真正无效果的语句仍然可以被检测到。

由索引模型根据 Issue 内容生成。