feat: Add bulk imports API for contacts (#1724)

spec/models/data_import_spec.rb

@@ -0,0 +1,13 @@
+require 'rails_helper'
+
+RSpec.describe DataImport, type: :model do
+  describe 'associations' do
+    it { is_expected.to belong_to(:account) }
+  end
+
+  describe 'validations' do
+    it 'returns false for invalid data type' do
+      expect(build(:data_import, data_type: 'Xyc').valid?).to eq false
+    end
+  end
+end