feat(whatsapp): add webhook registration and status endpoints (#13551)

## Description

Adds webhook configuration management for WhatsApp Cloud API channels,
allowing administrators to check webhook status and register webhooks
directly from Chatwoot without accessing Meta Business Manager.

## Type of change

- [ ] New feature (non-breaking change which adds functionality)


## Screenshots

<img width="1130" height="676" alt="Screenshot 2026-03-05 at 7 04 18 PM"
src="https://github.com/user-attachments/assets/f5dcd9dd-8827-42c5-a52b-1024012703c2"
/>
<img width="1101" height="651" alt="Screenshot 2026-03-05 at 7 04 29 PM"
src="https://github.com/user-attachments/assets/e0bd59f9-2a90-4f24-87c0-b79f21e721ee"
/>



## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/controllers/api/v1/accounts/concerns/whatsapp_health_management.rb

@@ -0,0 +1,55 @@
+module Api::V1::Accounts::Concerns::WhatsappHealthManagement
+  extend ActiveSupport::Concern
+
+  included do
+    skip_before_action :check_authorization, only: [:health, :register_webhook]
+    before_action :check_admin_authorization?, only: [:register_webhook]
+    before_action :validate_whatsapp_cloud_channel, only: [:health, :register_webhook]
+  end
+
+  def sync_templates
+    return render status: :unprocessable_entity, json: { error: 'Template sync is only available for WhatsApp channels' } unless whatsapp_channel?
+
+    trigger_template_sync
+    render status: :ok, json: { message: 'Template sync initiated successfully' }
+  rescue StandardError => e
+    render status: :internal_server_error, json: { error: e.message }
+  end
+
+  def health
+    health_data = Whatsapp::HealthService.new(@inbox.channel).fetch_health_status
+    render json: health_data
+  rescue StandardError => e
+    Rails.logger.error "[INBOX HEALTH] Error fetching health data: #{e.message}"
+    render json: { error: e.message }, status: :unprocessable_entity
+  end
+
+  def register_webhook
+    Whatsapp::WebhookSetupService.new(@inbox.channel).register_callback
+
+    render json: { message: 'Webhook registered successfully' }, status: :ok
+  rescue StandardError => e
+    Rails.logger.error "[INBOX WEBHOOK] Webhook registration failed: #{e.message}"
+    render json: { error: e.message }, status: :unprocessable_entity
+  end
+
+  private
+
+  def validate_whatsapp_cloud_channel
+    return if @inbox.channel.is_a?(Channel::Whatsapp) && @inbox.channel.provider == 'whatsapp_cloud'
+
+    render json: { error: 'Health data only available for WhatsApp Cloud API channels' }, status: :bad_request
+  end
+
+  def whatsapp_channel?
+    @inbox.whatsapp? || (@inbox.twilio? && @inbox.channel.whatsapp?)
+  end
+
+  def trigger_template_sync
+    if @inbox.whatsapp?
+      Channels::Whatsapp::TemplatesSyncJob.perform_later(@inbox.channel)
+    elsif @inbox.twilio? && @inbox.channel.whatsapp?
+      Channels::Twilio::TemplatesSyncJob.perform_later(@inbox.channel)
+    end
+  end
+end