fix: simplify save #49

database-1_test.go

database-2_test.go

database-4_test.go

database-5_test.go

database-6_test.go

database-7_test.go

database-logging.go

database-logging_test.go

database.go

database_test.go

errors.go

job-syncer.go

job-syncer_test.go

logger.go

logger_test.go

manager.go

manager_test.go

promise.go

promise_test.go

util.go