refactor: use reflect.TypeFor

[slightsharp]

Try to use better api reflect.TypeFor instead of reflect.TypeOf when we have known the type.
More info golang/go#60088

[greptile-apps]

Greptile Overview

Greptile Summary

This PR modernizes reflection code by replacing reflect.TypeOf with the newer reflect.TypeFor API introduced in Go 1.22. The refactoring spans 13 files and affects approximately 30+ instances across the codebase.

Key changes:

• Replaced reflect.TypeOf((*Interface)(nil)).Elem() pattern with cleaner reflect.TypeFor[Interface]()
• Converted reflect.TypeOf(Value{}) to reflect.TypeFor[Value]() for compile-time type safety
• Updated reflect.TypeOf(variable) to explicit reflect.TypeFor[ConcreteType]() for better code clarity
• Removed unnecessary variable declarations in cli/operator/generate_doc.go

Benefits:

• Improved code readability by eliminating awkward nil pointer and empty struct patterns
• Enhanced compile-time type safety with explicit type parameters
• More explicit and self-documenting code
• Aligns with modern Go best practices as recommended in the Go 1.22+ release

All changes are purely syntactic refactoring with no behavioral modifications. The refactoring is consistent and thorough across test files, API bindings, and configuration code.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• This is a pure refactoring that replaces reflect.TypeOf with the newer reflect.TypeFor API. The changes are semantically identical - both APIs return the same reflect.Type values. The refactoring improves code quality by using compile-time type parameters instead of runtime reflection, making the code more explicit and self-documenting. All changes follow the same consistent pattern across 13 files, and the project uses Go 1.24.6 which fully supports reflect.TypeFor (introduced in Go 1.22). No logic changes, no new dependencies, no behavioral modifications.
• No files require special attention

Important Files Changed

Filename	Overview
api/bind.go	Replaced reflect.TypeOf((*Binder)(nil)).Elem() with cleaner reflect.TypeFor[Binder]()
cli/operator/generate_doc.go	Replaced reflect.TypeOf(cfg) with reflect.TypeFor[config](), removing unnecessary variable declaration
exporter/model_test.go	Converted 9 type reflections from reflect.TypeOf(Type{}) to reflect.TypeFor[Type]() for better readability
networkconfig/ssv_test.go	Updated type reflection to use TypeFor for SSV and marshaledConfig types
protocol/v2/qbft/spectest/controller_type.go	Replaced reflect.TypeOf(test) with explicit reflect.TypeFor[*spectests.ControllerSpecTest]()
protocol/v2/qbft/spectest/msg_processing_type.go	Updated to use TypeFor with explicit type parameter for MsgProcessingSpecTest
protocol/v2/qbft/spectest/qbft_mapping_test.go	Converted 6 test type checks from reflect.TypeOf(&Type{}) to reflect.TypeFor[*Type]()
protocol/v2/ssv/spectest/committee_msg_processing_type.go	Updated two spec test structs to use TypeFor for type reflection
protocol/v2/ssv/spectest/msg_processing_type.go	Replaced reflect.TypeOf(test) with reflect.TypeFor[*MsgProcessingSpecTest]()
protocol/v2/ssv/spectest/multi_msg_processing_type.go	Updated to use TypeFor for MultiMsgProcessingSpecTest type
protocol/v2/ssv/spectest/multi_start_new_runner_duty_type.go	Converted two instances to use TypeFor for StartNewRunnerDutySpecTest and MultiStartNewRunnerDutySpecTest
protocol/v2/ssv/spectest/ssv_mapping_test.go	Updated 11 test type switches from reflect.TypeOf(&Type{}) to reflect.TypeFor[*Type]()
protocol/v2/ssv/spectest/sync_committee_aggregator_proof_type.go	Updated to use TypeFor for SyncCommitteeAggregatorProofSpecTest type

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant Code as Codebase
    participant Reflect as reflect Package
    
    Note over Dev,Reflect: Refactoring: TypeOf → TypeFor
    
    Dev->>Code: Identify reflect.TypeOf usage
    Code-->>Dev: Found 30+ instances across 13 files
    
    Dev->>Code: Replace TypeOf((*Interface)(nil)).Elem()
    Code->>Reflect: Call TypeFor[Interface]()
    Reflect-->>Code: Return reflect.Type (cleaner API)
    
    Dev->>Code: Replace TypeOf(Value{})
    Code->>Reflect: Call TypeFor[Value]()
    Reflect-->>Code: Return reflect.Type (compile-time safe)
    
    Dev->>Code: Replace TypeOf(&Type{})
    Code->>Reflect: Call TypeFor[*Type]()
    Reflect-->>Code: Return reflect.Type (explicit type parameter)
    
    Dev->>Code: Replace TypeOf(variable)
    Code->>Reflect: Call TypeFor[ConcreteType]()
    Note over Code,Reflect: Uses known type instead of runtime value
    Reflect-->>Code: Return reflect.Type (more explicit)
    
    Note over Dev,Code: All changes maintain identical behavior
    Note over Dev,Code: Benefits: Better readability, compile-time safety

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[greptile-apps]

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[iurii-ssv]

Good stuff! @slightsharp could you rebase the PR onto the latest stage branch (ideally with git merge stage so it doesn't need a force-push) ?

[slightsharp]

Good stuff! @slightsharp could you rebase the PR onto the latest stage branch (ideally with git merge stage so it doesn't need a force-push) ?

@iurii-ssv Of course. Rebased.

Please review it again. 😄

[iurii-ssv]

@slightsharp since PRs require multiple approvals to get merged ... I'm afraid you'd need to git merge stage until enough people approve