update hook payload to send session id

[darshana-v]

Copilot hook payload does not send session ID, and the only session logs I can find are in ~/.copilot/session-state. There is absolutely no identifier to group events of a session together or an association between parent ID and event ID currently. There are random occurrences of "sessionId" in the sessionStart hook event payload, but it is not consistent and not linked to the other hook events.

[gtrrz-victor]

Hi!
Just checking in, any updates on this, or an expected release date?
Having the sessionId on every hook payload is essential for building apps on top of this, so it would be really helpful to know if it's on the roadmap.

Thanks for all your work on this project! 🙏