[main] Source code updates from dotnet/arcade

[dotnet-maestro]

Note

This is a codeflow update. It may contain both source code changes from
the source repo
as well as dependency updates. Learn more here.

This pull request brings the following source code changes

From https://github.com/dotnet/arcade

• Subscription: ab0d56ad-2ca6-45b9-98fc-393e964e843f
• Build: 20260624.1 (320074)
• Date Produced: June 24, 2026 4:12:13 PM UTC
• Commit: e979774a8214bccc0ecc5af9c14e618e5c81c334
• Commit Diff: 0a80b03...e979774
• Branch: main

Diff the source with this PR branch

darc vmr diff --name-only https://github.com/dotnet/arcade:e979774a8214bccc0ecc5af9c14e618e5c81c334..https://github.com/dotnet/dotnet:darc-main-cf4e3130-ac87-4928-97f5-c154a02b7edc

[dotnet-maestro]

Note

PRs from original repository included in this codeflow update:

• Use deterministic values for _BuildNumber arcade#16954
• Add agentic workflow to update DefaultVersions.props arcade#16993
• Rename XUnitV3Project to MTPProject in Helix Sdk (breaking) arcade#16986
• Set TOOLCHAIN on BSD systems as well arcade#16995
• Bump Microsoft.Diagnostics.Runtime from 1.0.5 to 4.0.727802 arcade#16947
• Bump Polly.Core from 8.6.6 to 8.7.0 arcade#17011
• Bump Microsoft.OpenApi and Microsoft.OpenApi.YamlReader arcade#17010
• Bump Azure.Core from 1.58.0 to 1.59.0 arcade#17008
• [main] Source code updates from dotnet/dotnet arcade#17003
• [main] Update dependencies from dotnet/arcade, dotnet/arcade-services arcade#16999
• Add msbuild process termination to StopProcesses function arcade#17016
• Use Helix JobDetails QueueAlias/DockerTag for resubmission arcade#17017
• Install libinotify not inotify-tools on OpenBSD arcade#17022
• Job Monitor: cancel Helix jobs immediately on cancellation, don't wait for upload drain arcade#17019
• [main] Update dependencies from dotnet/xharness arcade#17006
• [main] Source code updates from dotnet/dotnet arcade#17020
• [main] Source code updates from dotnet/dotnet arcade#17028
• Install common error library in OpenBSD rootfs arcade#17027
• Add UseHelixMonitor to send-to-helix.yml arcade#17033
• [main] Update dependencies from dotnet/arcade-services, dotnet/dnceng arcade#17031
• Use gpgv instead of gpg for Release signature verification in install-debs.py arcade#17024
• Require a merged PR on use of the backport command arcade#17038
• Fix paths in send-to-helix.yml arcade#17036
• [main] Source code updates from dotnet/dotnet arcade#17040
• Fix #14026 NET task host MSB4216 via dotnet-host drive-casing probe (builds on #17002) arcade#17039

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[akoeplinger]

@am11 this contains the latest changes, thanks for noticing the flow was broken