.hash() return Int64 instead of UInt64

[Mintactus]

Description

Some engine like Neo4j GDS requires Int64 for their IDs, UInt64 make it crash, I think UInt64 should stay the default return behavior but having an optional parameter to decide the format for the hash() output would make it more flexible for different engines having different IDs data types.

[nameexhaustion]

You can use Expr.reinterpret to cheaply turn it into Int64

>>> pl.Series([1], dtype=pl.UInt64)
shape: (1,)
Series: '' [u64]
[
	1
]
>>> pl.Series([1], dtype=pl.UInt64).reinterpret()
shape: (1,)
Series: '' [i64]
[
	1
]

[ritchie46]

@nameexhaustion examples seems like a solid solution for this. Will close.