fix: insert with missing=default uses column default before using dom… #674

Loadtest Results

param	v12.0.2	head	main
bytes_in.mean	1008	983	983
bytes_in.total	26432903	22767821	22897646
bytes_out.mean	3848	3848	3849
bytes_out.total	100926713	89115175	89665480
duration	59999694322	60007859366	59999931577
latencies.50th	1007511	1013862	1014903
latencies.90th	2063678	2157171	2128450
latencies.95th	14891193	18136654	17951743
latencies.99th	15221223	18512412	18320327
latencies.max	50581451	33360819	29482313
latencies.mean	2285975	2590240	2574694
latencies.min	157113	166271	168906
latencies.total	59956564682	59982202342	59972351598
rate	437	386	388
requests	26228	23157	23293
status_codes.200	14307	12632	12705
status_codes.201	4769	4210	4236
status_codes.204	7152	6315	6352
success	1	1	1
throughput	437	386	388
wait	996104	1008118	1033128