Fix redacting log article: pushed code out to snippets and added missing classes

[adegeo]

Summary

• Pushed code from inline to snippets.
• Added missing information that were declared in other articles.

Fixes #54570

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Internal previews

📄 File	🔗 Preview link
docs/core/extensions/logging/source-generation.md	Compile-time logging source generation

[Copilot]

Pull request overview

This PR updates the compile-time logging source-generation article to use external snippet files (instead of inline code blocks) and fixes the “Redacting sensitive information in logs” example by including the previously missing supporting types in the snippet source.

Changes:

• Replaced multiple inline C# examples in source-generation.md with :::code snippet references.
• Added a new C# snippets project and extracted example code into dedicated snippet files.
• Added supporting redaction and data-classification types to make the redaction example self-contained.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/core/extensions/logging/source-generation.md	Replaces inline examples with snippet references, including the redaction section.
docs/core/extensions/logging/snippets/source-generation/csharp/csharp.csproj	Adds a snippet project to compile the extracted examples.
docs/core/extensions/logging/snippets/source-generation/csharp/Program.cs	Adds a minimal entry point for the snippets project.
docs/core/extensions/logging/snippets/source-generation/csharp/BasicUsage/StaticLog.cs	Adds snippet source for basic static LoggerMessage usage.
docs/core/extensions/logging/snippets/source-generation/csharp/BasicUsage/ExtensionLog.cs	Adds snippet source for extension-method LoggerMessage usage.
docs/core/extensions/logging/snippets/source-generation/csharp/BasicUsage/InstanceLog.cs	Adds snippet source for instance/field-based logger usage.
docs/core/extensions/logging/snippets/source-generation/csharp/BasicUsage/PrimaryCtorLog.cs	Adds snippet source for primary-constructor logger usage.
docs/core/extensions/logging/snippets/source-generation/csharp/BasicUsage/DynamicLog.cs	Adds snippet source for dynamic log level usage.
docs/core/extensions/logging/snippets/source-generation/csharp/LogMethodAnatomy/LogMethods.cs	Adds snippet source for a “valid log method” example.
docs/core/extensions/logging/snippets/source-generation/csharp/LogMethodAnatomy/IndeterminateOrder.cs	Adds snippet source for indeterminate parameter ordering example.
docs/core/extensions/logging/snippets/source-generation/csharp/LogMethodAnatomy/CaseInsensitiveExample.cs	Adds snippet source for case-insensitive template name support example.
docs/core/extensions/logging/snippets/source-generation/csharp/MoreLoggingExamples/LoggingSample.cs	Adds snippet source for additional logging examples section.
docs/core/extensions/logging/snippets/source-generation/csharp/RedactingSensitiveInformation/RedactionSetup.cs	Adds self-contained redaction setup snippet (taxonomy, attribute, and redactor).

[gewarren]

Since this one is repeated, maybe omit it here and just put it inline in the Markdown.

[adegeo]

It's your article 😁