Constant Columns should output statistics #19416
Description
Is your feature request related to a problem or challenge?
We lose opportunities for many optimizations due to not outputting these statistics
Describe the solution you'd like
In project and similar operators, when encountering a constant column, we should be able to output statistics about it, for example min and max values should be the same values, the memory usage should be constant etc, such info can later be used to optimize sorts and so on.
Describe alternatives you've considered
No response
Additional context
No response