Move cache configuration to options

[tobias-tengler]

• Scopes document caches to schema, but not a specific executor
• Aligns regular Hot Chocolate cache configuration to the options based approach in Fusion
• Removes IRequestExecutorOptionsMonitor, since async configuration is no longer used

[Copilot]

Pull Request Overview

This PR moves cache configuration from separate service collection methods to the standard GraphQL options pattern, consolidating cache size settings with other schema options for better consistency and discoverability.

Key changes include:

• Moving cache size configuration from AddDocumentCache/AddOperationCache methods to SchemaOptions properties
• Adding proper validation that throws exceptions for invalid cache sizes instead of silently clamping values
• Updating documentation and tests to reflect the new configuration approach

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
website/src/docs/hotchocolate/v16/migrating/migrate-from-15-to-16.md	Added migration documentation showing the old vs new cache configuration patterns
src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Execution/FusionOptions.cs	Updated cache size validation to throw exceptions instead of silently clamping values
src/HotChocolate/Core/test/Execution.Tests/WarmupRequestTests.cs	Simplified service provider access by removing GetCombinedServices() calls
src/HotChocolate/Core/test/Execution.Tests/PreparedOperationCacheTests.cs	Updated test to use new ModifyOptions pattern instead of AddOperationCache method
src/HotChocolate/Core/test/Execution.Tests/DocumentCacheTests.cs	Added new test for document cache configuration using the new options pattern
src/HotChocolate/Core/src/Types/SchemaOptions.cs	Added cache size properties with validation and updated FromOptions method
src/HotChocolate/Core/src/Types/IReadOnlySchemaOptions.cs	Added cache size property definitions and fixed truncated comment
src/HotChocolate/Core/src/Execution/RequestExecutorManager.cs	Updated cache instantiation to use schema options instead of separate options classes
src/HotChocolate/Core/src/Execution/DependencyInjection/RequestExecutorServiceCollectionExtensions.cs	Removed deprecated AddDocumentCache and AddOperationCache methods
src/HotChocolate/Core/src/Execution/DependencyInjection/InternalServiceCollectionExtensions.cs	Removed TryAddDefaultCaches method that registered the old cache options
src/HotChocolate/Core/src/Execution/Caching/PreparedOperationCacheOptions.cs	Deleted obsolete cache options class

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (20f556d) to head (55c9c82).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #8793   +/-   ##
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