feat(media-supply): resource cache sync and order flow refinements

Add a resource cache sync entrypoint (RunMediaResourceSyncOnce) driven
by the new scheduler job, and rework the backlink/sync worker around it.
Tune the meijiequan client and slow the default backlink sync interval
from 10m to 30m to reduce upstream pressure.

Trim unused public/transport surface (handler + router + swagger) and
simplify admin-web order management and ops-web media-supply views,
dropping stale shared-types fields.

server/internal/tenant/transport/router.go

@@ -116,7 +116,6 @@ func RegisterRoutes(app *bootstrap.App) {
 	mediaSupply.PUT("/resources/:id/price", mediaSupplyHandler.SetResourcePrice)
 	mediaSupply.POST("/orders", middleware.RequireCurrentBrand(), mediaSupplyHandler.CreateOrder)
 	mediaSupply.GET("/orders", mediaSupplyHandler.ListOrders)
-	mediaSupply.POST("/orders/sync-backlinks", mediaSupplyHandler.SyncBacklinks)
 	mediaSupply.GET("/orders/:id", mediaSupplyHandler.GetOrder)
 	mediaSupply.GET("/wallet", mediaSupplyHandler.WalletStatus)
 	mediaSupply.GET("/wallet/ledgers", mediaSupplyHandler.ListWalletLedgers)