fix(eventstore): fill new column with data (#2288)

* fix: smaller outage on events migration first part

* fix: fill old events with sequence

* fix: migration add transactions

* fix: mig

* rename mig

* replace migration with setup step

* regenerate mock

* add step 20 to config

* log

* simplify step

* limit 1000

* limit 500

internal/command/setup_step20.go

@@ -0,0 +1,26 @@
+package command
+
+import (
+	"context"
+
+	"github.com/caos/zitadel/internal/domain"
+	"github.com/caos/zitadel/internal/eventstore"
+)
+
+type Step20 struct{}
+
+func (s *Step20) Step() domain.Step {
+	return domain.Step20
+}
+
+func (s *Step20) execute(ctx context.Context, commandSide *Commands) error {
+	return commandSide.SetupStep20(ctx, s)
+}
+
+func (c *Commands) SetupStep20(ctx context.Context, step *Step20) error {
+	fn := func(iam *IAMWriteModel) ([]eventstore.EventPusher, error) {
+		err := c.eventstore.Step20(ctx, iam.Events[len(iam.Events)-1].Sequence())
+		return nil, err
+	}
+	return c.setup(ctx, step, fn)
+}