Summary

Define the NetworkMetricEvent struct for EventBus-based metric publishing as part of the monitoring decoupling effort.

Parent Issue

• deps: Decouple monitoring integration via EventBus pattern #342

Tasks

• Create include/kcenon/network/events/ directory if not exists
• Define NetworkMetricEvent struct with metric_name, value, timestamp, and labels
• Add specialized network metric event types (connection, transfer, latency, error)
• Ensure events satisfy common_system's concepts::EventType concept

Implementation

namespace kcenon::network::events {

struct NetworkMetricEvent {
    std::string metric_name;
    double value;
    std::chrono::steady_clock::time_point timestamp;
    std::map<std::string, std::string> labels;
    
    explicit NetworkMetricEvent(const std::string& name, double val,
        const std::map<std::string, std::string>& lbls = {})
        : metric_name(name), value(val),
          timestamp(std::chrono::steady_clock::now()),
          labels(lbls) {}
};

} // namespace kcenon::network::events

Acceptance Criteria

• NetworkMetricEvent struct defined in new header
• Satisfies common_system's EventType concept
• Unit tests for event creation and serialization