[Enhancement]: Create an optimized compression implementation for toolkit's uddsketch

[RobAtticus]

What type of enhancement is this?

Performance

What subsystems and features will be improved?

Compression

What does the enhancement do?

Implement a custom compression code path for type uddsketch which is a part of timescaledb-toolkit. We utilize uddsketch heavily in both hypertables and caggs (multiple levels), but only achieve a relatively modest compression ratio. Even a modest improvement by doing a custom compression algo for the sketches would pay big dividends in terms of storage.

Implementation challenges

No response