Bump GitHub.Copilot.SDK from 1.0.8 to 1.0.9 - #1229

The type or namespace name 'AssistantMessageEvent' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'MessageOptions' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'CopilotSession' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'CopilotSession' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'CopilotSession' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'ResumeSessionConfig' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'SessionConfig' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'ProviderConfig' could not be found (are you missing a using directive or an assembly reference?)

The type or namespace name 'SDK' does not exist in the namespace 'GitHub.Copilot' (are you missing an assembly reference?)

The type or namespace name 'SDK' does not exist in the namespace 'GitHub.Copilot' (are you missing an assembly reference?)

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-dotnet@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/