chore(support/v2): release 2.9.0

[release-please-token-provider]

🤖 I have created a release beep boop

2.9.0 (2026-06-10)

Features

• add contains/minContains/maxContains members (fadb422)
• library: add missing json schema properties (db41a3c)

Bug Fixes

• library: always copy unevaluated properties (3951a31)
• library: avoid false circular refs for external schema re-exports (a058913)
• library: avoid false circular refs for external schema re-exports (1bace68)
• library: merge contains compat members into missing properties (7dc45e1)
• library: remove unshipped schema extension fallback (b301827)
• library: use version-specific schema keyword callbacks (f93d76a)
• library: use x-jsonschema schema extensions (ec04a7f)

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This PR was generated with Release Please. See documentation.

[github-code-quality]

Code Coverage Overview

Languages: C#

C# / code-coverage/dotnet

The overall coverage in the release-please--bran... branch is 41%. The coverage in the support/v2 branch is 88%.

Show a code coverage summary of the most impacted files.

File	support/v2 39d3cc2	release-please--bran... b2b6867	+/-
/home/runner/wo...MapParameter.cs	100%	0%	-100%
/home/runner/wo...Deserializer.cs	81%	0%	-81%
/home/runner/wo...pyReferences.cs	63%	31%	-32%
/home/runner/wo...piJsonReader.cs	100%	72%	-28%
/home/runner/wo...Deserializer.cs	90%	62%	-28%
/home/runner/wo...s/OpenApiTag.cs	100%	76%	-24%
/home/runner/wo...Deserializer.cs	100%	81%	-19%
/home/runner/wo...Deserializer.cs	96%	81%	-15%
/home/runner/wo...Deserializer.cs	97%	89%	-8%
/home/runner/wo...piComponents.cs	94%	87%	-7%

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_{Updated June 10, 2026 17:07 UTC
Code Coverage is in Public Preview. Learn more and provide us with your feedback.}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[release-please-token-provider]

🤖 Created releases:

• v2.9.0

🌻