Mixer cannot request recipes

[nuclearkatie]

Alone among Cycamore archetypes, Mixer has no ability to request recipes for any of its n commodity streams.

This became an issue for me when I tried to send the output of an Enrichment facility directly to a Mixer; Enrichment produces a uranium-only recipe (sending any other elements directly to tails), and I wanted to convert that material to UF6 immediately to align with realistic chemical forms. Mixer can't ask for recipes, but enrichment requires a recipe request and not just a commodity request. The two can't be linked as-is

In the meantime, I just placed a storage facility in between the two, because my timesteps are small enough that this wasn't a problem. However, this might not be the only use case of wanting Mixer to be able to request recipes for one or more of its incommodities.