Enhancement: Move reporting metrics to postgres (#606)

spec/models/event_spec.rb

@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+RSpec.describe Event, type: :model do
+  describe 'validations' do
+    it { is_expected.to validate_presence_of(:account_id) }
+    it { is_expected.to validate_presence_of(:name) }
+    it { is_expected.to validate_presence_of(:value) }
+  end
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:inbox).optional }
+    it { is_expected.to belong_to(:user).optional }
+    it { is_expected.to belong_to(:conversation).optional }
+  end
+end