Add HybridCache documentation to caching guide

[Copilot]

Plan: Update Caching Documentation with HybridCache

• Update the introduction section to mention HybridCache as a third caching approach
• Add a new "HybridCache" section after "Worker Service caching" explaining:
  • What HybridCache is (combines in-memory and distributed caching)
  • Key features (stampede protection, configurable serialization, tag-based invalidation)
  • When to use it
• Add HybridCache API documentation including:
  • Installation and registration
  • Basic GetOrCreateAsync usage
  • Configuration options
  • Tag-based invalidation
  • Serialization configuration
  • Distributed cache integration
• Create code examples in ./snippets/caching/hybrid-cache/csharp/ folder
• Build and test the examples
• Address code review feedback (add region tags, improve comments)
• Run security checks (CodeQL - no issues found)
• Address PR feedback:
  • Target .NET 10 instead of .NET 9
  • Fix grammar (remove comma before "and provides")
  • Fix heading ("Configure" instead of "Configuring")
  • Update package versions to 10.0.0 to match .NET 10 target
• Final verification and documentation build

Summary

Successfully added comprehensive HybridCache documentation to the .NET caching guide. All feedback addressed. Package versions now align with .NET 10 target framework.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update Caching docs with HybridCache</issue_title>
<issue_description>### Type of issue

Need to update docs to contain HybridCache

Description

Prelim content found here:
https://learn.microsoft.com/en-us/aspnet/core/performance/caching/hybrid?view=aspnetcore-9.0

Page URL

https://learn.microsoft.com/en-us/dotnet/core/extensions/caching

Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/extensions/caching.md

Document Version Independent Id

07beacc6-ddcf-2fd5-b896-00f999764b00

Platform Id

97e770aa-0b26-d69d-80e4-578056090645

Article author

@IEvangelist

Metadata

• ID: ed120c7a-f4c0-c1d1-cb8c-168a3eba6dd9
• PlatformId: 97e770aa-0b26-d69d-80e4-578056090645
• Service: dotnet-fundamentals

Related Issues</issue_description>

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

• Fixes Update Caching docs with HybridCache #45184

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Internal previews

📄 File	🔗 Preview link
docs/core/extensions/caching.md	docs/core/extensions/caching

[gewarren]

@copilot please respond to feedback.

[Copilot]

@copilot please respond to feedback.

All feedback addressed in commit 207bf9c:

• Updated project to target .NET 10
• Fixed grammar in introduction
• Updated heading to use imperative mood

[Copilot]

Pull request overview

This pull request adds comprehensive documentation for HybridCache to the .NET caching guide. HybridCache is a new caching library introduced in .NET 9 that combines in-memory and distributed caching with additional features like stampede protection and tag-based invalidation.

Changes:

• Updated introduction to list HybridCache as a third caching approach alongside in-memory and distributed caching
• Added complete HybridCache section with subsections covering key features, setup, usage, configuration, tag-based invalidation, and serialization
• Created code examples demonstrating HybridCache functionality in a new snippets directory
• Added HybridCache reference link to the "See also" section

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
docs/core/extensions/caching.md	Added HybridCache section with comprehensive documentation, updated introduction to mention three caching approaches, and added reference link in "See also"
docs/core/extensions/snippets/caching/hybrid-cache/csharp/Program.cs	Created code snippets demonstrating HybridCache registration, configuration, basic usage, tag-based caching, invalidation, serialization, and Redis integration
docs/core/extensions/snippets/caching/hybrid-cache/csharp/HybridCacheExample.csproj	Created project file for code examples targeting .NET 10 with necessary package references