feat: Add inbox details endpoint (#5549)

This change targets the public API and is related to the Inbox with channel type API.
Exposes public inbox details under /public/api/v1/inboxes/{inbox_identifier}. This allows access to feature flags and business hours configured for the inbox.

ref: #5514

app/controllers/public/api/v1/inboxes_controller.rb

@@ -3,9 +3,15 @@ class Public::Api::V1::InboxesController < PublicController
   before_action :set_contact_inbox
   before_action :set_conversation
 
+  def show
+    @inbox_channel = ::Channel::Api.find_by!(identifier: params[:id])
+  end
+
   private
 
   def set_inbox_channel
+    return if params[:inbox_id].blank?
+
     @inbox_channel = ::Channel::Api.find_by!(identifier: params[:inbox_id])
   end
 

app/views/public/api/v1/inboxes/show.json.jbuilder

@@ -0,0 +1,3 @@
+json.identifier @inbox_channel.identifier
+json.identity_validation_enabled @inbox_channel.hmac_mandatory
+json.partial! 'public/api/v1/models/inbox.json.jbuilder', resource: @inbox_channel.inbox

app/views/public/api/v1/models/_inbox.json.jbuilder

@@ -0,0 +1,6 @@
+json.name resource.name
+json.timezone resource.timezone
+json.working_hours resource.weekly_schedule
+json.working_hours_enabled resource.working_hours_enabled
+json.csat_survey_enabled resource.csat_survey_enabled
+json.greeting_enabled resource.greeting_enabled