[Bug]: proto_utils.py task does not propagate metadata from python type to proto

[konradkalita]

What happened?

I wonder why metadata is not passed to proto object for a task, although it is passed for a message. Is it a bug or there is a reason for it?

Implementation for context:

    @classmethod
    def task(cls, task: types.Task) -> a2a_pb2.Task:
        return a2a_pb2.Task(
            id=task.id,
            context_id=task.context_id,
            status=cls.task_status(task.status),
            artifacts=(
                [cls.artifact(a) for a in task.artifacts]
                if task.artifacts
                else None
            ),
            history=(
                [cls.message(h) for h in task.history]  # type: ignore[misc]
                if task.history
                else None
            ),
        )

    @classmethod
    def message(cls, message: types.Message | None) -> a2a_pb2.Message | None:
        if message is None:
            return None
        return a2a_pb2.Message(
            message_id=message.message_id,
            content=[cls.part(p) for p in message.parts],
            context_id=message.context_id or '',
            task_id=message.task_id or '',
            role=cls.role(message.role),
            metadata=cls.metadata(message.metadata),
            extensions=message.extensions or [],
        )

Relevant log output

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[sokoliva]

Thank you @konradkalita for pointing this out. You are right, it is a bug and will be fixed.