chore(deps): update dependency polyfill to 8.8.1

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	patch	8.8.0 -> 8.8.1

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Release Notes

SimonCropp/Polyfill (Polyfill)

v8.8.1

Compare Source

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Configuration

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🚦 Automerge: Enabled.

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

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This PR has been generated by Renovate Bot.

[claude]

Claude finished @thomhurst's task —— View job

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Code Review Complete ✅

I've completed a thorough review of this dependency update PR. Here's my analysis:

Review Checklist

• Examine the changed file (Directory.Packages.props)
• Understand what Polyfill library does
• Assess impact on code quality and best practices
• Check for potential bugs or issues
• Evaluate performance considerations
• Review security implications
• Assess test coverage impact

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Review Summary

This PR updates the Polyfill dependency from 8.8.0 to 8.8.1 - a patch version bump that should contain only bug fixes and security patches.

Findings

✅ Code Quality & Best Practices

• Excellent: Centralized package management via Directory.Packages.props following .NET best practices
• Proper Configuration: The Polyfill package is correctly configured with <PrivateAssets>all</PrivateAssets> and appropriate <IncludeAssets> - this is the recommended setup for analyzer/build-time packages

✅ Usage Analysis

The Polyfill library is actively used throughout the codebase, primarily for:

• File I/O operations: FilePolyfill.WriteAllTextAsync() and FilePolyfill.ReadAllTextAsync() in 11+ files
• Test infrastructure: Source generator tests, public API tests, and test project files
• Build integration: Imported via Polyfill.targets in multiple projects

✅ Potential Issues

• Risk: Very Low - This is a patch version update (8.8.0 → 8.8.1) which should only contain bug fixes
• No Breaking Changes Expected - Patch versions maintain API compatibility
• Well-Maintained Library - Simon Cropp is a reputable .NET ecosystem maintainer

✅ Performance Considerations

• No Performance Impact - Polyfill provides compile-time polyfills and analyzer functionality
• Build-Time Only - Configured as <PrivateAssets>all</PrivateAssets> means no runtime impact
• Analyzer Package - Helps enable modern C# features on older target frameworks

✅ Security Assessment

• Low Security Risk - Patch version updates typically address security issues if any
• Reputable Source - Well-established library from a trusted maintainer
• No Runtime Dependencies - Build-time only package reduces attack surface

✅ Test Coverage Impact

• No Test Changes Needed - Patch updates shouldn't require test modifications
• Existing Tests Cover Usage - The codebase has comprehensive test coverage for areas using Polyfill APIs
• Recommendation: Run existing test suite to verify compatibility

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Recommendation: ✅ APPROVE

This is a low-risk dependency update that:

• Updates a well-maintained polyfill library
• Contains only patch-level changes
• Is properly configured for build-time usage
• Has established usage patterns in the codebase

Suggested Actions:

1. ✅ Merge this PR (patch updates are generally safe)
2. ✅ Let automated tests validate the change
3. ✅ Monitor for any unexpected issues post-merge

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