Document goldsmithing recycling

[Drefvelin]

Summary

• Describe the goldsmithing jewelry provider: one matching live project, recipe materials returned, infused gem kept out of the return.
• Note that socketed jewelry and ambiguous project matches are left unhandled, and that the usual return-rate cap applies.

Test plan

• Read the provider table and goldsmithing section against the Recycler change once that pull request is open.

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