fix agent_turn and agent_speaking spans hierarchy & add agent_turn for tts_task

[longcw]

1. ensure agent_turn is under the agent_session span
2. fix agent_speaking span when false interruption happens
3. add agent_turn for tts_task

example: function call and paused agent speeches

[chenghao-mou]

There is another similar issue: when dealing with false interruption, agent_speaking (after the pause) is grouped under a user_turn. I am open to solving it in a different PR.

[longcw]

There is another similar issue: when dealing with false interruption, agent_speaking (after the pause) is grouped under a user_turn. I am open to solving it in a different PR.

oh right, it's because the speaking state is updated in _start_false_interruption_timer. I'll create a fix.

[theomonnom]

Should this be named generation_id instead?

[longcw]

There is another similar issue: when dealing with false interruption, agent_speaking (after the pause) is grouped under a user_turn. I am open to solving it in a different PR.

oh right, it's because the speaking state is updated in _start_false_interruption_timer. I'll create a fix.

fixed in this pr as well.

[chenghao-mou]

LGTM. Nice work!

Tested with false interruptions and session.say. Spans were created correctly.

[theomonnom]

Can we make this field private?

[longcw]

sounds good, #4124