feat: sla-2 add automation backend support for SLA (#8775)

* feat: add automation support for SLA

* feat: add sla action in automtion UI

* chore: revert frontend changes

* chore: refactor to ee namespace

* chore: refactor automation rule to ee namespace

* feat: create applied_sla table entry

* chore: add applied_sla spec

* chore: rubocop fixes

---------

Co-authored-by: Sojan <sojan@pepalo.com>

spec/enterprise/services/enterprise/action_service_spec.rb

@@ -0,0 +1,23 @@
+require 'rails_helper'
+
+describe ActionService do
+  let(:account) { create(:account) }
+
+  describe '#add_sla' do
+    let(:sla_policy) { create(:sla_policy, account: account) }
+    let(:conversation) { create(:conversation, account: account) }
+    let(:action_service) { described_class.new(conversation) }
+
+    it 'adds the sla policy to the conversation and create applied_sla entry' do
+      action_service.add_sla(sla_policy)
+      expect(conversation.reload.sla_policy_id).to eq(sla_policy.id)
+
+      # check if appliedsla table entry is created with matching attributes
+      applied_sla = AppliedSla.last
+      expect(applied_sla.account_id).to eq(account.id)
+      expect(applied_sla.sla_policy_id).to eq(sla_policy.id)
+      expect(applied_sla.conversation_id).to eq(conversation.id)
+      expect(applied_sla.sla_status).to eq('active')
+    end
+  end
+end