Summary

Use KCENON_HAS_MONITORING_SYSTEM for messaging_system monitoring integration gates.

5W1H Specification

• Who: messaging_system maintainers
• What: Replace BUILD_WITH_MONITORING_SYSTEM checks
• Where: message_bus_collector headers/sources
• When: TBD
• Why: Align monitoring integration with unified macro set
• How: Include feature_flags header and update macros

Parent Issue

kcenon/common_system#223

Tasks

• Include feature_flags.h in collector headers
• Replace BUILD_WITH_MONITORING_SYSTEM with KCENON_HAS_MONITORING_SYSTEM
• Update docs to reference KCENON_* macros

Acceptance Criteria

• Monitoring integration gates use KCENON_HAS_MONITORING_SYSTEM
• Behavior matches current builds