ci: Replace reviewdog with sarif2gha. (#39)

[MinoruSekine]

Closes #39

Summary by CodeRabbit

• Chores
  • Improved automated code-quality checks by updating how PowerShell analysis results appear as pull request annotations.
  • Hardened workflow checkout steps by preventing credential persistence during linting and validation jobs.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/lint.yml:
- Around line 31-39: Update the sarif2gha command in the workflow step to
reference PSScriptAnalyzer.sarif with the exact casing used by the generated
file, replacing the lowercase psscriptanalyzer.sarif argument.

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• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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📥 Commits

Reviewing files that changed from the base of the PR and between 0474ca9 and a49f3fc.

📒 Files selected for processing (1)

• .github/workflows/lint.yml