Add more Ash Refining Beakers - specifically to strongholds

[Aethereal]

With ash refining beakers mostly changed to serve as a convenience/quality of life thing, I suggest making them more accessible by adding them to other claimable strongholds. This should encourage more PC interactions with these strongholds and also slightly improve accessibility to these QOL improving creations.

PCs in Ticker Square have been offering ash refining in the past, so one of those strongholds to support that at the very least. Probably the Apothecary.