Add OutOfHours field to AdminCreateBookingForUserRequest. When true, skip exceptional hours closed check and include out_of_hours in INSERT. Add tests verifying: bypass of exceptional closure, rejection without flag, overlap detection still works, and time blocker warning.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>