Merge upstream/master into develop

Sync upstream changes from perfect-panel/server

  Includes updates from v1.0.1 to v1.2.5:
  - Currency configuration support
  - Subscribe improvements (short token, inventory check, etc.)
  - Node management enhancements
  - Database migrations
  - Bug fixes and optimizations

pkg/xerr/errMsg.go

@@ -56,6 +56,7 @@ func init() {
 		SubscribeIsUsedError:            "Subscribe is used",
 		SingleSubscribeModeExceedsLimit: "Single subscribe mode exceeds limit",
 		SubscribeQuotaLimit:             "Subscribe quota limit",
+		SubscribeOutOfStock:             "Subscribe out of stock",
 
 		// auth error
 		VerifyCodeError: "Verify code error",