fix: Disable IMAP inboxes that requires authorization (#12092)

This PR disables queueing IMAP sync jobs for emails channels that 
- are in free plan if on Chatwoot cloud.
- requires authorization

spec/enterprise/jobs/inboxes/fetch_imap_email_inboxes_job_spec.rb

@@ -0,0 +1,26 @@
+require 'rails_helper'
+
+RSpec.describe Inboxes::FetchImapEmailInboxesJob do
+  context 'when chatwoot_cloud is enabled' do
+    let(:account) { create(:account) }
+    let(:premium_account) { create(:account, custom_attributes: { plan_name: 'Startups' }) }
+    let(:imap_email_channel) { create(:channel_email, imap_enabled: true, account: account) }
+    let(:premium_imap_channel) { create(:channel_email, imap_enabled: true, account: premium_account) }
+
+    before do
+      premium_account.custom_attributes['plan_name'] = 'Startups'
+      InstallationConfig.where(name: 'DEPLOYMENT_ENV').first_or_create!(value: 'cloud')
+      InstallationConfig.where(name: 'CHATWOOT_CLOUD_PLANS').first_or_create!(value: [{ 'name' => 'Hacker' }])
+    end
+
+    it 'skips inboxes with default plan' do
+      expect(Inboxes::FetchImapEmailsJob).not_to receive(:perform_later).with(imap_email_channel)
+      described_class.perform_now
+    end
+
+    it 'processes inboxes with premium plan' do
+      expect(Inboxes::FetchImapEmailsJob).to receive(:perform_later).with(premium_imap_channel)
+      described_class.perform_now
+    end
+  end
+end