feat: migrate unique constraints v1 to v2 (#1274)

* fix: unique migration

* fix: unique migration

* fix: remove migrations

* fix: member events

internal/v2/command/setup_step11.go

@@ -0,0 +1,35 @@
+package command
+
+import (
+	"context"
+	"github.com/caos/logging"
+	"github.com/caos/zitadel/internal/v2/domain"
+	iam_repo "github.com/caos/zitadel/internal/v2/repository/iam"
+)
+
+type Step11 struct {
+	MigrateV1EventstoreToV2 bool
+}
+
+func (s *Step11) Step() domain.Step {
+	return domain.Step11
+}
+
+func (s *Step11) execute(ctx context.Context, commandSide *CommandSide) error {
+	return commandSide.SetupStep11(ctx, s)
+}
+
+func (r *CommandSide) SetupStep11(ctx context.Context, step *Step11) error {
+	fn := func(iam *IAMWriteModel) (*iam_repo.Aggregate, error) {
+		iamAgg := IAMAggregateFromWriteModel(&iam.WriteModel)
+		uniqueConstraints := NewUniqueConstraintReadModel(ctx, r)
+		err := r.eventstore.FilterToQueryReducer(ctx, uniqueConstraints)
+		if err != nil {
+			return nil, err
+		}
+		iamAgg.PushEvents(iam_repo.NewMigrateUniqueConstraintEvent(ctx, uniqueConstraints.UniqueConstraints))
+		logging.Log("SETUP-M9fsd").Info("migrate v1 eventstore to v2")
+		return iamAgg, nil
+	}
+	return r.setup(ctx, step, fn)
+}