[REQUEST] AttributeWriteHandle::UniquePtr typedef

The AttributeWriteHandle in AttributeArray.h has a typedef for a std::unique_ptr but it is ScopedPtr, not UniquePtr. Unfortunately as this is named differently to the AttributeHandle::UniquePtr it doesnt override that typedef (which the AttributeWriteHandle inherits from the AttributeHandle) so using AttributeWriteHandle::UniquePtr (which is valid) creates a AttributeHandle::UniquePtr (note: not a write handle). I imagine this is not intended as it is pretty confusing.

I think it would be better to rename the ScopedPtr typedef in the AttributeWriteHandle definition to UniquePtr (why was this different anyway?) or at least add a new UniquePtr typedef in AttributeWriteHandle for a unique ptr so that this doesn't happen.

Not a huge issue but just something I stumbled upon.

Open AttributeArray.h and compare the AttributeWriteHandle typedefs with the inherited AttributeHandle typedefs. Confirm how AttributeWriteHandle::UniquePtr currently resolves, then update the typedef naming so the write-handle alias is unambiguous and verify the surrounding C++ tests or build still pass.

Written by the indexing model from the issue text.