feat(suppressions): add reviewer information

[cbill-s]

Description

Add reviewer information in the SuppressionProperties struct.

Checklist

• Tests added and all succeed
• Linted
• README.md updated, if user-facing

🚨After having merged, please update the snyk-ls and CLI go.mod to pull in latest client.

[CLAassistant]

All committers have signed the CLA.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues
✅	Secrets	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.

[snyk-pr-review-bot]

PR Reviewer Guide 🔍

🧪 PR contains tests

🔒 No security concerns identified

⚡ No major issues detected

📚 Repository Context Analyzed This review considered 1 relevant code sections from 1 files (average relevance: 0.35) sarif/sarif_types.go (lines 1-231)

🤖 Repository instructions applied (from AGENTS.md)