.NET: Update Microsoft.Extensions.AI to 10.5.0 and OpenAI to 2.10.0 and remove unused refs

[westey-m]

Summary

Update Microsoft.Extensions.AI family of packages to 10.5.0 and OpenAI to 2.10.0 in central package management.

Package Changes (dotnet/Directory.Packages.props)

Primary updates

Package	Old	New
Microsoft.Extensions.AI	10.4.0	10.5.0
Microsoft.Extensions.AI.Abstractions	10.4.0	10.5.0
Microsoft.Extensions.AI.OpenAI	10.4.0	10.5.0
Microsoft.Extensions.Compliance.Abstractions	10.4.0	10.5.0
OpenAI	2.9.1	2.10.0

Transitive dependency bumps (required by MEAI 10.5.0)

Package	Old	New
Microsoft.Bcl.AsyncInterfaces	10.0.4	10.0.6
Microsoft.Extensions.DependencyInjection.Abstractions	10.0.4	10.0.6
Microsoft.Extensions.Logging.Abstractions	10.0.4	10.0.6
System.Diagnostics.DiagnosticSource	10.0.4	10.0.6
System.Text.Json	10.0.4	10.0.6
System.Threading.Channels	10.0.4	10.0.6

Validation

• ✅ Full solution build: 0 errors, 0 warnings
• ✅ All unit tests pass (3,833 tests across 25 projects)

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates central package versions for Microsoft.Extensions.AI (and related dependencies) and OpenAI, aligning the repo with newer releases.

Changes:

• Bumped OpenAI from 2.9.1 to 2.10.0.
• Bumped Microsoft.Extensions.AI / Abstractions / OpenAI to 10.5.0.
• Updated several transitive/supporting packages (e.g., System.Text.Json, DiagnosticSource, Channels) to 10.0.6.