Mark outdated workflow nodes on canvas and send a summary with Gmail (add-on)

This is an add-on for the template [Check if workflows contain build-in nodes that are not of the latest version](https://n8n.io/workflows/2301-check-if-workflows-contain-build-in-nodes-that-are-not-of-the-latest-version/)

Purpose

This workflow highlights outdated nodes within all workflows of a single n8n instance and places an updated preconfigured node right next to it, so it can be swapped easily.


How it works

- The parent workflow checks the entire n8n instance for outdated nodes within all workflows and passes a list of those alongside some metadata to this workflow - This workflow then processes that data and updates the affected workflows - Outdated nodes are renamed by prepending an emoji (default: ⚠️) - this is also used for future checks to prevent from double-processing - The latest version of each outdated node is added to the workflow canvas (not wired up) behind the old one, slightly shifted in position - An Email is sent with a list of modified workflows

In the settings it is possible to define:

- which symbol/emoji should be prepended to outdated notes - whether to include only major node updates or all of them - whether to add the new nodes to the canvas or not