Improve resource alert email

[gstout52]

Description

When an instance exceeds the Warning threshold for resource usage, this email is sent:

This task is to improve the email.

Let's use the following:

Hello USER FIRST NAME,

Your FlowFuse Instance "prometheus-test" in Team "FlowFuse Team" is using more than 75% of its CPU. This can cause degraded performance, errors, and crashes.

This can occur for a number of reasons including:

• Needing a larger instance size for your workload
• An issue in your flows or functions holding that are causing high CPU usage
• An issue in a third-party library or node

Possible Solutions:

• Select a larger instance type
• Disabling some nodes to identify a problem area
• Check your flows for loops or functions that are causing high CPU usage
• Check the issue tracker of your contrib nodes
• Check the Instance Logs for clues and errors

CTA: Upgrade my instance [url should direct user to the instance name /settings/change-type]

Epic/Story

No response

Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate

[gstout52]

@ZJvandeWeg