Include known providers in error message when provider is not found

[Copilot]

• [x] Understand the issue and explore the repository structure
• [x] Update DefaultClientServices.cs error message to include known providers for the specified kind
• [x] Update DefaultSiloServices.cs error message to include known providers for the specified kind
• [x] Create tests to verify the enhanced error messages
• [x] Fix missing 'or' in DefaultClientServices.cs error message (pre-existing bug)
• [x] Fix using statement ordering in DefaultClientServices.cs to comply with .editorconfig
• [x] Fix test file build errors - use ConfigureAppConfiguration pattern and correct extension methods
• [x] Request code review - passed with no issues
• [x] Run security scanning - no vulnerabilities found

Summary

This PR successfully implements the requested feature to include known/registered providers in error messages when a provider is not found.

Key Changes:

1. Enhanced error messages in both DefaultClientServices.cs and DefaultSiloServices.cs
2. Error messages now include a sorted, comma-separated list of known providers for the requested kind
3. Fixed a pre-existing typo in DefaultClientServices.cs where "or" was missing
4. Fixed using statement ordering to comply with .editorconfig
5. Added comprehensive tests in ProviderErrorMessageTests.cs

Example Output:

Could not find Clustering provider named 'NonExistentProvider'. This can indicate that either the 'Microsoft.Orleans.Sdk' or the provider's package are not referenced by your application. Known Clustering providers: AzureStorage, Default, DynamoDB.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Include known providers in error message when a provider is not found</issue_title> <issue_description>We should update these error messages to include the list of known/registered providers for the specified kind (eg, Clustering, GrainStorage, etc)

https://github.com/dotnet/orleans/blob/f23233a70dd3c4d5f216c7be2aa2ed8faca7a58a/src/Orleans.Core/Core/DefaultClientServices.cs#L213

https://github.com/dotnet/orleans/blob/f23233a70dd3c4d5f216c7be2aa2ed8faca7a58a/src/Orleans.Runtime/Hosting/DefaultSiloServices.cs#L478</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes dotnet/orleans#9732

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Microsoft Reviewers: Open in CodeFlow

[ReubenBond]

@Copilot the build failed

[Copilot]

@Copilot the build failed

Fixed using statement ordering to comply with .editorconfig (System.* namespaces first, then alphabetically sorted). See commit cd40fc7.

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• 0t3vsblobprodcus362.vsblob.vsassets.io
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• ckzvsblobprodcus347.vsblob.vsassets.io
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• frdvsblobprodcus327.vsblob.vsassets.io
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• lylvsblobprodcus31.vsblob.vsassets.io
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[Copilot]

Look at the build errors

Fixed the build errors in ProviderErrorMessageTests.cs. The issues were:

1. Using AddConfiguration() on IConfiguration instead of using ConfigureAppConfiguration() on the host builder
2. Using parameterless UseOrleans()/UseOrleansClient() which aren't available on IHostBuilder
3. Missing #nullable enable directive for nullable reference types

See commit 221f423.