feat: send instagram message after 24 hours (#4698)

Added MESSAGE_TAG: HUMAN_AGENT for Instagram messages if the user wants to send it after the standard message window.

Fixes #4689

app/models/conversation.rb

@@ -93,7 +93,7 @@ class Conversation < ApplicationRecord
   delegate :auto_resolve_duration, to: :account
 
   def can_reply?
-    return last_message_less_than_24_hrs? if additional_attributes['type'] == 'instagram_direct_message'
+    return can_reply_on_instagram? if additional_attributes['type'] == 'instagram_direct_message'
 
     return true unless inbox&.channel&.has_24_hour_messaging_window?
 
@@ -112,6 +112,18 @@ class Conversation < ApplicationRecord
     Time.current < last_incoming_message.created_at + 24.hours
   end
 
+  def can_reply_on_instagram?
+    global_config = GlobalConfig.get('ENABLE_MESSENGER_CHANNEL_HUMAN_AGENT')
+
+    return false if last_incoming_message.nil?
+
+    if global_config['ENABLE_MESSENGER_CHANNEL_HUMAN_AGENT']
+      Time.current < last_incoming_message.created_at + 7.days
+    else
+      last_message_less_than_24_hrs?
+    end
+  end
+
   def update_assignee(agent = nil)
     update!(assignee: agent)
   end