feat(server): legacy 码表 → codes 库新表的幂等回填(Go 双方言)(#codes-lib)

server/cmd/migrate/main.go

@@ -17,6 +17,7 @@ import (
 	"log"
 	"os"
 
+	"github.com/wangjia/pangolin/server/internal/codes"
 	"github.com/wangjia/pangolin/server/internal/config"
 	"github.com/wangjia/pangolin/server/internal/store"
 )
@@ -48,6 +49,13 @@ func main() {
 		if err := store.ApplyCodesLibMigrations(context.Background(), db, driver); err != nil {
 			log.Fatalf("migrate up (codes lib): %v", err)
 		}
+		n, err := codes.BackfillLegacy(context.Background(), db)
+		if err != nil {
+			log.Fatalf("migrate up (codes backfill): %v", err)
+		}
+		if n > 0 {
+			log.Printf("migrate: codes backfill — %d legacy codes migrated", n)
+		}
 		log.Println("migrate: up — done")
 
 	case "down":