chore(deps): update dependency https://github.com/betabitplus-template-lab/python-lib.git to v0.3.0

[betabitplus-template-lab-renovate]

This PR contains the following updates:

Package	Type	Update	Change
https://github.com/betabitplus-template-lab/python-lib.git	template	minor	v0.2.0 → v0.3.0

---

Release Notes

betabitplus-template-lab/python-lib (https://github.com/betabitplus-template-lab/python-lib.git)

v0.3.0

Compare Source

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate.

[betabitplus-template-lab-renovate]

ℹ️ Artifact update notice

File name: .editorconfig

This file had merge conflicts. Please check the proposed changes carefully!

[betabitplus]

Expected-failure evidence

This pull request is intentionally not mergeable as a clean update.

• Downstream-owned value: max_line_length = 96
• Template v0.3.0 value: max_line_length = 120
• Copier emitted real conflict markers in .editorconfig.
• Lab downstream validation run 29353371296 failed as designed.
• The template repository was subsequently rolled back from component C3 to verified C2 through python-lib#4, whose Linux/macOS/Windows acceptance matrix passed.

Keep this PR open and unmerged as the lab's conflict-handling evidence.