[Kubuxu]

Changes

• Enable Slack notifications for nightly CI profiles using the SLACK_WEBHOOK_URL repository Actions secret.
• Follow issue reporting rules: notify only after a report is posted, respecting reporting-disabled and skip-on-pass settings.
• Capture the exact report comment URL, or the issue URL for its first report, using actions/github-script.
• Keep Slack disabled by default for other reusable workflow callers.

Verification

• Parsed both workflow YAML files.
• Exercised report creation and comment URL capture with a mocked GitHub API.
• Exercised pass/fail and skip-on-pass reporting decisions.
• Executed the Slack notification shell against a local HTTP endpoint, including HTTP rejection and missing-secret cases.
• Live GitHub Actions and Slack delivery were not exercised.

Setup

Set repository Actions secret SLACK_WEBHOOK_URL to the full Slack incoming webhook URL.

[Copilot]

🟢 Approval recommended

No active review issues are identified for the nightly Slack notification changes.

No open issues 🎉

What changed in this PR

Adds Slack notifications for nightly scenario reports, linking each notification to the posted GitHub issue or comment.

Changes:

• Enables Slack notifications for nightly profiles while leaving them disabled by default for other reusable workflow callers.
• Uses actions/github-script to capture the report URL.
• Sends notifications only after successful report posting, respecting reporting-disabled and skip-on-pass settings.

File	Description
.github/​workflows/​ci_run.yml	Adds optional Slack notifications and captures the posted report URL.
.github/​workflows/​ci_nightly.yml	Enables Slack notifications for nightly profiles and documents the required secret.

_{Review effort: Balanced}