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/media_supply_handler.go

@@ -241,15 +241,6 @@ func (h *MediaSupplyHandler) SessionStatus(c *gin.Context) {
 	response.Success(c, data)
 }
 
-func (h *MediaSupplyHandler) SyncBacklinks(c *gin.Context) {
-	data, err := h.svc.SyncBacklinks(c.Request.Context())
-	if err != nil {
-		response.Error(c, err)
-		return
-	}
-	response.Success(c, data)
-}
-
 func parseOptionalIntQuery(c *gin.Context, key string) (int, error) {
 	raw := c.Query(key)
 	if raw == "" {

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)