Add customer booking links to onboarding project tasks

When onboarding projects change status, missing scheduling links delay bookings. Add booking links to tasks and spaces so customers can book sessions the same day.

Overview

Onboarding projects stall when engineers must manually share scheduling links; this flow injects owner-specific booking URLs directly into project spaces and task descriptions so delivery engineers and customers can get kickoff and technical sessions booked the same day. That removes repetitive coordination and keeps onboarding timelines on track.