feat(startup): print service banner after listener ready

internal/db/migrator/migrator.go

@@ -42,6 +42,14 @@ const (
 	zoneDropLegacySQLVersion int64 = 202607130001
 )
 
+// Report describes the database migration state observed during startup.
+type Report struct {
+	Backend string
+	Enabled bool
+	Version int64
+	Applied bool
+}
+
 func gooseDialect() string {
 	if !config.Config.Database.Enabled {
 		return dialectSqlite
@@ -57,7 +65,7 @@ func migrationDir() string {
 }
 
 // Migrate 执行数据库迁移：全部结构变更走 goose SQL；Zone 历史域名导入在 SQL 之后自动执行。
-func Migrate() {
+func Migrate() Report {
 	gormDB := db.DB(context.Background())
 	if gormDB == nil {
 		log.Fatalf("[%s] database not initialized\n", dbType())
@@ -75,6 +83,10 @@ func Migrate() {
 	if err := resyncGooseVersionSequence(sqlDB); err != nil {
 		log.Fatalf("[%s] resync goose_db_version sequence failed: %v\n", dbType(), err)
 	}
+	previousVersion, err := goose.GetDBVersion(sqlDB)
+	if err != nil {
+		log.Fatalf("[%s] get goose version failed: %v\n", dbType(), err)
+	}
 	// 1) SQL up to zone-import marker (includes of_zones DDL; still has legacy columns).
 	if err := goose.UpTo(sqlDB, migrationDir(), zoneImportSQLVersion); err != nil {
 		log.Fatalf("[%s] goose migrate (up to zone import) failed: %v\n", dbType(), err)
@@ -91,8 +103,18 @@ func Migrate() {
 	}
 
 	clearSystemConfigCache()
+	currentVersion, err := goose.GetDBVersion(sqlDB)
+	if err != nil {
+		log.Fatalf("[%s] get migrated goose version failed: %v\n", dbType(), err)
+	}
 
 	log.Printf("[%s] goose migrate success\n", dbType())
+	return Report{
+		Backend: dbType(),
+		Enabled: true,
+		Version: currentVersion,
+		Applied: currentVersion != previousVersion,
+	}
 }
 
 // maybeImportZoneDomains runs legacy→Zone import only when the DB is still in the