feat(ee): Add transcription support for audio messages (#11670)

<img width="419" alt="Screenshot 2025-06-03 at 4 25 37 PM"
src="https://github.com/user-attachments/assets/4b6ddd11-9b91-4981-a571-83746cc4d40b"
/>


Fixes https://github.com/chatwoot/chatwoot/issues/10182

---------

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

spec/enterprise/jobs/messages/audio_transcription_job_spec.rb

@@ -0,0 +1,41 @@
+require 'rails_helper'
+
+RSpec.describe Messages::AudioTranscriptionJob do
+  subject(:job) { described_class.perform_later(attachment_id) }
+
+  let(:message) { create(:message) }
+  let(:attachment) do
+    message.attachments.create!(
+      account_id: message.account_id,
+      file_type: :audio,
+      file: fixture_file_upload('public/audio/widget/ding.mp3')
+    )
+  end
+  let(:attachment_id) { attachment.id }
+  let(:conversation) { message.conversation }
+  let(:transcription_service) { instance_double(Messages::AudioTranscriptionService) }
+
+  it 'enqueues the job' do
+    expect { job }.to have_enqueued_job(described_class)
+      .with(attachment_id)
+      .on_queue('low')
+  end
+
+  context 'when performing the job' do
+    before do
+      allow(Messages::AudioTranscriptionService).to receive(:new).with(attachment).and_return(transcription_service)
+      allow(transcription_service).to receive(:perform)
+    end
+
+    it 'calls AudioTranscriptionService with the attachment' do
+      expect(Messages::AudioTranscriptionService).to receive(:new).with(attachment)
+      expect(transcription_service).to receive(:perform)
+      described_class.perform_now(attachment_id)
+    end
+
+    it 'does nothing when attachment is not found' do
+      expect(Messages::AudioTranscriptionService).not_to receive(:new)
+      described_class.perform_now(999_999)
+    end
+  end
+end