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Their type in BD&D was 'Enchanted Humanoid', not whatever the BD&D term was for Constructs. Also, in their description there's a line "...and will fight to the death to defend them". I would think that would be destroyed if they were intended to be Constructs.
Yeah, I"m not sure what an "enchanted humanoid" is either, so I took it to mean "artifically created humanoid", but I'm never opposed to another outsider.