feat: Customizable webhook timeout configuration (#12777)

## Summary
- Ability to configure the webhook timeout for Chatwoot self hosted
installations

fixes: https://github.com/chatwoot/chatwoot/issues/12754

lib/webhooks/trigger.rb

@@ -26,7 +26,7 @@ class Webhooks::Trigger
       url: @url,
       payload: @payload.to_json,
       headers: { content_type: :json, accept: :json },
-      timeout: 5
+      timeout: webhook_timeout
     )
   end
 
@@ -73,4 +73,11 @@ class Webhooks::Trigger
   def message_id
     @payload[:id]
   end
+
+  def webhook_timeout
+    raw_timeout = GlobalConfig.get_value('WEBHOOK_TIMEOUT')
+    timeout = raw_timeout.presence&.to_i
+
+    timeout&.positive? ? timeout : 5
+  end
 end