Emerald keys: exchanges and settlement deliveries

Proposed maximum: four Emerald keys per UTC week, from separate routes:

• Resource exchange, at most one/day and two/week: 32 raw copper + 8 raw iron, OR 128 sugar cane + 128 kelp, for one key.
• Community project, one/week: 64 raw copper + 16 raw iron delivered to a real active project, for one key.
• Settlement order, one/week: 256 sugar cane + 256 kelp delivered to an active requisition, for one key.

These are playtest recipes, not claims of equal market value or effort. Legitimately traded or automatically farmed commodities may be handed in; the hand-in itself gives no gathering XP.

Complete deliveries only: preview exact materials and remaining demand, then confirm. Insufficient key space, demand or allowance must take nothing. Project/order resources enter actual settlement stock. Exchange resources go to the published server sink.

Up to four is not a promise of four: finite projects or orders may be unavailable. No extra Larks or item payment is implied. Key-hand-in resources and supported direct conversions into them are excluded from crate rewards to avoid a guaranteed replacement-key loop.