Test qa.yaml with starflow PR #101 changes

[Copilot]

• Have you followed the guidelines for contributing?
• Have you signed the CLA?
• Have you successfully run make lint && make test?
• Have you added an entry to the changelog (docs/reference/changelog.rst)?

---

Description

Tests craft-parts qa.yaml workflow against starflow PR #101 changes before merging in both repositories.

Changes

• Updated .github/workflows/qa.yaml to reference @copilot/use-pristine-ubuntu-action (the actual branch name from starflow PR plugins: strip plugin properties in non-destructive way (CRAFT-394) #101) instead of @main for starflow workflows
• Added header comments linking to Add pristine-ubuntu-action to hosted runners starflow#101

All 6 workflow references now point to the PR branch:

• canonical/starflow/.github/workflows/lint-python.yaml@copilot/use-pristine-ubuntu-action
• canonical/starflow/.github/workflows/test-python.yaml@copilot/use-pristine-ubuntu-action (5 jobs)

Note: This is temporary for cross-repo validation.

Original prompt

Create a pull request that tests the craft-parts repository's qa.yaml GitHub Actions workflow on the same branch or environment as referenced in the starflow pull request at canonical/starflow#101. The new PR should include a reference or link to the starflow PR (#101) and make it clear that its purpose is to verify the workflow's behavior in coordination with that work. Ensure the PR description contains a direct link back to canonical/starflow#101 for traceability and cross-repo collaboration.

This pull request was created as a result of the following prompt from Copilot chat.

Create a pull request that tests the craft-parts repository's qa.yaml GitHub Actions workflow on the same branch or environment as referenced in the starflow pull request at canonical/starflow#101. The new PR should include a reference or link to the starflow PR (#101) and make it clear that its purpose is to verify the workflow's behavior in coordination with that work. Ensure the PR description contains a direct link back to canonical/starflow#101 for traceability and cross-repo collaboration.

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[lengau]

@copilot you need to use the branch name, not the PR number

[Copilot]

@copilot you need to use the branch name, not the PR number

Updated to use the actual branch name copilot/use-pristine-ubuntu-action from starflow PR #101. (4395711)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/canonical/starflow/pulls/101
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)