support Dates.CompoundPeriod in deserialization?

First time I am using Arrow with Dates.jl and unfortunatly immediately run into something which I expected to be supported.

When writing and reading a DataFrame with Dates durations like CompoundPeriod, Arrow does not automatically reconstruct the type. I know I can add my custom conversion rules, but is there a reason why this conversion rule is not there by default?

Concretely, my `Dates.CompoundPeriod` gets transformed into `NamedTuple{(:periods,), Tuple{Vector{Dates.Second}}}`

Start by reproducing the reported write-and-read path with a DataFrame containing a Dates.CompoundPeriod. Read the existing custom conversion rules and deserialization handling, then determine where the default rule should recognize the resulting NamedTuple. Done means deserialization automatically reconstructs Dates.CompoundPeriod without a custom conversion rule.

Written by the indexing model from the issue text.