fix: validate explicit migrations and preserve large business ids

pkg/module/module.go

@@ -4,7 +4,9 @@
 package module
 
 import (
+	"fmt"
 	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
 	"kra/pkg/database/migration"
 )
 
@@ -28,16 +30,40 @@ type TimedTask struct {
 }
 
 type Definition struct {
-	Name       string
-	Migrations []migration.Step
-	Surface    Surface
-	TimedTasks []TimedTask
+	Name           string
+	Migrations     []migration.Step
+	Surface        Surface
+	TimedTasks     []TimedTask
+	Prerequisites  func(*gorm.DB) error
+	ValidateSchema func(*gorm.DB) error
 }
 
 type Catalog struct {
 	Definitions []Definition
 }
 
+func (c Catalog) CheckPrerequisites(db *gorm.DB) error {
+	for _, item := range c.Definitions {
+		if item.Prerequisites != nil {
+			if err := item.Prerequisites(db); err != nil {
+				return fmt.Errorf("%s prerequisites: %w", item.Name, err)
+			}
+		}
+	}
+	return nil
+}
+
+func (c Catalog) CheckSchema(db *gorm.DB) error {
+	for _, item := range c.Definitions {
+		if item.ValidateSchema != nil {
+			if err := item.ValidateSchema(db); err != nil {
+				return fmt.Errorf("%s: %w", item.Name, err)
+			}
+		}
+	}
+	return nil
+}
+
 func (c Catalog) MigrationSteps() []migration.Step {
 	var steps []migration.Step
 	for _, item := range c.Definitions {