database migrations: fix some error messages

database/migrations.go

@@ -110,6 +110,6 @@
 		return fmt.Errorf("schema '%s' is %w", s.Name, ErrDBNotVersioned)
 	}
 	if err != nil {
-		return fmt.Errorf("error while checking the database version: %w", err)
+		return fmt.Errorf("error while checking the schema '%s' version: %w", s.Name, err)
 	}
 	if dirty {
@@ -114,6 +114,6 @@
 	}
 	if dirty {
-		return errors.New("schema '%s' is marked 'dirty'")
+		return fmt.Errorf("schema '%s' is marked 'dirty'", s.Name)
 	}
 
 	if version < lastVersion {