fix: close business flow regressions

backend/api/cmd/cli/main_test.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"testing"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func TestPrepareAdditiveMigrationsSkipsMissingLegacyTable(t *testing.T) {
+	databaseService, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("open sqlite database: %v", err)
+	}
+	if err := prepareAdditiveMigrations(databaseService, "postgres"); err != nil {
+		t.Fatalf("missing legacy table should not require a backfill: %v", err)
+	}
+}