Sync main → net8

[arcenox]

Automated Branch Sync

This PR syncs recent changes from main to net8.

What was done:

• Cherry-picked new commits from main
• Updated Directory.Build.props versions (10.x.x → ${dotnet_version}.x.x, DotNetVersion range)
• Preserved all .csproj files from net8
• Preserved version-specific files listed in .sync-exclude
• Skipped commits already in the target branch (patch-level dedup)

Version-specific files (NOT synced):

Files in .sync-exclude have different implementations per .NET version and are kept as-is.

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Created automatically by branch sync workflow

[arcenox]

⚠️ Manual review needed — version-specific files were modified on main

The following commits changed files listed in .sync-exclude. These files have different implementations per .NET version and were not synced automatically. You may need to manually apply the equivalent changes to the net8 version:

• c3e6a320 (Add head-to-head BenchmarkDotNet comparisons vs Hangfire & Quartz (Add head-to-head BenchmarkDotNet comparisons vs Hangfire & Quartz #697)) modified TickerQ.sln

What to do:

1. Review each commit above on main
2. Determine if the change needs an equivalent update for net8
3. If so, apply the change manually using the version-specific API (e.g., SetPropertyCalls<T> instead of UpdateSettersBuilder<T>)