all workflows should have an overall time limit

[d-morrison]

• no more than 50 minutes
• make a note in copilot instructions

[github-actions]

The GitHub issue proposes setting a maximum overall time limit of 50 minutes for all workflows. Additionally, it suggests updating the Copilot instructions to include a note about this time limit, ensuring that guidelines are clear and adhered to. This aims to standardize workflow execution times and enhance efficiency.