change from db_text to nvarchar

pkg/infra/serverlock/migrations.go

@@ -8,7 +8,7 @@ func (sl *ServerLockService) AddMigration(mg *migrator.Migrator) {
 		Name: "server_lock",
 		Columns: []*migrator.Column{
 			{Name: "id", Type: migrator.DB_BigInt, IsPrimaryKey: true, IsAutoIncrement: true},
-			{Name: "operation_uid", Type: migrator.DB_Text},
+			{Name: "operation_uid", Type: migrator.DB_NVarchar, Length: 100},
 			{Name: "version", Type: migrator.DB_BigInt},
 			{Name: "last_execution", Type: migrator.DB_BigInt, Nullable: false},
 		},

pkg/infra/serverlock/serverlock.go

@@ -21,6 +21,7 @@ type ServerLockService struct {
 
 // Init this service
 func (sl *ServerLockService) Init() error {
+	sl.log = log.New("infra.lockservice")
 	return nil
 }