Summary

Refactors type_traits.h to:

• Use thread_concepts.h for shared concepts
• Remove duplicated definitions (JobType, JobCallable)
• Simplify SFINAE patterns with requires clauses

Parent Issue

Part of #271

Tasks

• Include thread_concepts.h
• Remove duplicated concept definitions
• Update job_type_traits to use concepts directly
• Simplify is_valid_job_type using concepts

Related Files

• include/kcenon/thread/impl/typed_pool/type_traits.h