Add types for benchmarks

[IonBazan]

Q	A
Type	improvement
BC Break	no (internal classes only)
Fixed issues	#2945 (comment)

Summary

Add missing types in Benchmarks and use #[BeforeMethod] attribute consistently.

Important note here: I had to move #[BeforeMethods] only to the child classes as it appears that using PHP Attributes changes the order of execution of these methods when tagging both base and child classes - it previously executed parent first, now executes child first which breaks these benchmarks.

[GromNaN]

Thank you!

[Copilot]

Pull request overview

This PR modernizes the benchmark suite by adding proper type declarations and migrating from annotation-based to attribute-based PhpBench configuration.

• Migrated from @BeforeMethods annotations to #[BeforeMethods] attributes
• Added type declarations to all properties and methods in benchmark classes
• Moved #[BeforeMethods] from parent class to child classes to maintain correct execution order

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
benchmark/BaseBench.php	Removed annotation-based @BeforeMethods and added type declaration for $documentManager property
benchmark/Document/StoreDocumentBench.php	Added #[BeforeMethods] attribute with proper method ordering
benchmark/Document/LoadDocumentBench.php	Added #[BeforeMethods] attribute with all required methods, added type declarations for $userId property and loadDocument() method
benchmark/Document/HydrateDocumentBench.php	Added #[BeforeMethods] attribute with all required methods, added type declarations for all properties

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[IonBazan]

@GromNaN important note here - looks like we are only running Performance Tests against PHP 8.1 so they are not using native lazy objects.

[GromNaN]

looks like we are only running Performance Tests against PHP 8.1 so they are not using native lazy objects.

Good point, we can switch to CI to 7.4.