Add a deploy compose E2E that runs an agent through the real images - #729

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/

Possible null reference argument for parameter 'actual' in 'void ShouldBeStringTestExtensions.ShouldContain(string actual, string expected, Case caseSensitivity = Case.Insensitive, string? customMessage = null)'.

Possible null reference argument for parameter 'actual' in 'void ShouldBeStringTestExtensions.ShouldContain(string actual, string expected, Case caseSensitivity = Case.Insensitive, string? customMessage = null)'.

The type 'T' cannot be used as type parameter 'TService' in the generic type or method 'ResolutionExtensions.Resolve<TService>(IComponentContext)'. Nullability of type argument 'T' doesn't match 'notnull' constraint.

Possible null reference argument for parameter 'actual' in 'void ShouldBeStringTestExtensions.ShouldContain(string actual, string expected, Case caseSensitivity = Case.Insensitive, string? customMessage = null)'.

Non-nullable property 'RecomputedHash' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'StoredHash' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Dereference of a possibly null reference.

'IMiscellaneousClient.RenderArbitraryMarkdown(NewArbitraryMarkdown)' is obsolete: 'This client is being deprecated and will be removed in the future. Use MarkdownClient.RenderArbitraryMarkdown instead.'

Dereference of a possibly null reference.