ci: bump SonarSource/sonarqube-scan-action from 7.0.0 to 8.0.0 #21

Job	Run time
Install pep517 \| macos-latest \| py3.12	8s
Install fallback \| macos-latest \| py3.11	14s
Install pep517 \| ubuntu-latest \| py3.12	11s
Install fallback \| macos-latest \| py3.12	5s
Install fallback \| ubuntu-latest \| py3.11	11s
Install pep517 \| windows-latest \| py3.12	4s
Install pep517 \| windows-latest \| py3.11	7s
Install fallback \| ubuntu-latest \| py3.12	11s
Install fallback \| windows-latest \| py3.12	4s
Install fallback \| windows-latest \| py3.11	4s
Install pep517 \| ubuntu-latest \| py3.11	10s
Install pep517 \| macos-latest \| py3.11	6s
API smoke \| ${{ matrix.os }} \| py${{ matrix.python-version }}	0s
Live Claude + Haiku validation (manual)	0s
	1m 35s

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