Sets content type but is not setting custom metadata from DC fields
Can set content type AND meta on copy(); very unclear docs

Have to set in copy(metadata=...) Content-Type, and customs sans
x-aws-meta.
Works
works

Can't seem to get key for copied object, why?
Don't need to pre-create the dst_key.

Why can't I get any metadata, size, etc from src_key or new dst_key??