https://github.com/apache/airflow/blob/main/airflow/cli/commands/task_command.py#L145
"""For storage of arbitrary notes concerning the task instance."""
    __tablename__ = "task_instance_note"
    user_id = Column(Integer, ForeignKey("ab_user.id", name="task_instance_note_user_fkey"), nullable=True)
    task_id = Column(StringID(), primary_key=True, nullable=False)
    dag_id = Column(StringID(), primary_key=True, nullable=False)
    run_id = Column(StringID(), primary_key=True, nullable=False)
    map_index = Column(Integer, primary_key=True, nullable=False)
    content = Column(String(1000).with_variant(Text(1000), "mysql"))
    created_at = Column(UtcDateTime, default=timezone.utcnow, nullable=False)
    updated_at = Column(UtcDateTime, default=timezone.utcnow, onupdate=timezone.utcnow, nullable=False)
    task_instance = relationship("TaskInstance", back_populates="task_instance_note")
    __table_args__ = (
        PrimaryKeyConstraint(
            "task_id", "dag_id", "run_id", "map_index", name="task_instance_note_pkey", mssql_clustered=True
        ),
        ForeignKeyConstraint(
            (dag_id, task_id, run_id, map_index),
            [
                "task_instance.dag_id",
                "task_instance.task_id",
                "task_instance.run_id",
                "task_instance.map_index",
            ],
            name="task_instance_note_ti_fkey",
            ondelete="CASCADE",
        ),
    )
    def __init__(self, content, user_id=None):