Multi-Vendor foundation #2340
Description
Although we won't create a full marketplace solution, if Lunar had a simple "vendor" concept, it would allow for enhancements by devs.
We could add Vendors, link products (optionally) to vendors and also…
- Add a vendor_id to OrderLines — allowing tracking of which vendor supplied which line.
- Fire VendorAssigned or VendorRemoved events to support automation or auditing.
- Support vendor_id scoping in product queries (filters, GraphQL, etc.).
Bake in vendor awareness but not vendor logic.
Provide clean extension points — events, policies, interfaces — that a plugin can use to implement marketplace behaviour.