Add sticker fulfillment tracking to user model and admin interface

[Copilot]

Adds order status tracking for stickers with admin workflows to view pending orders and mark them fulfilled.

Database Schema

• New sticker_fulfilment_status enum: not_ordered (default), ordered, fulfilled
• Added stickerFulfilmentStatus column to user table
• Migration: 0028_robust_power_pack.sql

Admin Interface

List page (/dashboard/admin/admin/sticker-orders):

• Queries users where stickerFulfilmentStatus = 'ordered'
• Grid view showing profile, name, Slack link, status

Detail page (/dashboard/admin/admin/sticker-orders/[id]):

• Fetches user's shipping address from IDV
• Action to update status to fulfilled with confirmation
• Disabled when status is not ordered

Dashboard integration:

• Added "Sticker Orders" card to main admin page with Sticker icon

Implementation Notes

Follows existing patterns from market item orders (themed-box components, z-index layering for clickable cards, admin guard middleware).

Original prompt

Add a field to user called stickerFulfilmentStatus, which should be an enum with values 'not_ordered' (default), 'ordered', 'fulfilled'. Add a page to the dashboard/admin page to show users with ordered statuses, when clicked on it should go to an admin/admin/sticker-orders/[id] which should be a page that shows you the user's address and you should be able to mark it as fulfilled there. Make it as consistent as possible with the existing ui and code. Don't touch any other code that you don't need to, this includes formatting files

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