Background

Part of #363 — Phase 3

Replace lightweight_di_container in logger_system with common_system::service_container registration.

Scope

• Replace lightweight_di_container<T> (string-based) with type-based service_container registration
• Update writer/formatter/filter factory patterns
• Remove lightweight_di_container.h, di_container_interface.h, lightweight_container.h
• Update service_registration.h to use ModuleRegistrar concept
• Verify all logger_system tests pass

Key Migration Points

• String-based resolve("name") → Type-based resolve<IWriter>()
• register_factory() / register_singleton() → register_factory<T>() with service_lifetime
• Error codes: logger-specific → common::di::di_error_codes

Affected Files

• src/impl/di/lightweight_di_container.h (remove)
• src/impl/di/di_container_interface.h (remove)
• src/impl/di/lightweight_container.h (remove)
• include/kcenon/logger/di/service_registration.h (update)
• tests/unit/di_test/di_container_test.cpp (update)

Acceptance Criteria

• lightweight_di_container removed
• All services registered through service_container
• All tests pass under ASAN and TSAN