feat: init migrations for transactional tables (#9946)

# Which Problems Are Solved

To start with transactional tables we need to setup the new `zitadel`
schema in a way that does not rely on the event store later.

# How the Problems Are Solved

Setup step added which calls the function which executes the migrations.

# Additional Changes

none

# Additional Context

- closes #9933

cmd/setup/54.go

@@ -0,0 +1,38 @@
+package setup
+
+import (
+	"context"
+	_ "embed"
+
+	v3_db "github.com/zitadel/zitadel/backend/v3/storage/database"
+	"github.com/zitadel/zitadel/backend/v3/storage/database/dialect/postgres"
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/eventstore"
+)
+
+type TransactionalTables struct {
+	dbClient *database.DB
+}
+
+func (mig *TransactionalTables) Execute(ctx context.Context, _ eventstore.Event) error {
+	_, err := mig.dbClient.ExecContext(ctx, "CREATE SCHEMA IF NOT EXISTS zitadel")
+	if err != nil {
+		return err
+	}
+
+	config := &postgres.Config{Pool: mig.dbClient.Pool}
+	pool, err := config.Connect(ctx)
+	if err != nil {
+		return err
+	}
+
+	return pool.(v3_db.Migrator).Migrate(ctx)
+}
+
+func (mig *TransactionalTables) String() string {
+	return "54_repeatable_transactional_tables"
+}
+
+func (mig *TransactionalTables) Check(lastRun map[string]interface{}) bool {
+	return true
+}

cmd/setup/setup.go

@@ -289,6 +289,9 @@ func Setup(ctx context.Context, config *Config, steps *Steps, masterKey string)
 		&RiverMigrateRepeatable{
 			client: dbClient,
 		},
+		&TransactionalTables{
+			dbClient: dbClient,
+		},
 	}
 
 	for _, repeatableStep := range repeatableSteps {