Improve E2E test Stability

[aholstrup1]

❔What, Why & How

• Refresh E2E access token more aggressively
• Update how app signing is validated

[Copilot]

Pull Request Overview

Refresh the E2E access token more aggressively by reducing the wait time before refreshing from 30 minutes down to 10 minutes.

• Lower the threshold for skipping a token refresh from 30 → 10 minutes
• Adjust the early-return logic in the RefreshToken function

Comments suppressed due to low confidence (2)

e2eTests/e2eTestHelper.psm1:70

• The comment still refers to a 30-minute threshold but the code now uses 10 minutes. Please update the comment to reflect the new interval or make it dynamic.

        # Check if the last token refresh was more than 30 minutes ago

e2eTests/e2eTestHelper.psm1:71

• Add or update unit/e2e tests to cover the new 10-minute refresh logic and ensure the early-return behavior works as expected.

        if ((-not $force) -and ($script:lastTokenRefresh -ne 0) -and (([DateTime]::Now - $script:lastTokenRefresh).TotalMinutes -lt 10)) {