[mad201802]

This pull request introduces a structured, real-time safe logging system to the Sero library, enabling fine-grained diagnostics and operational visibility across all core subsystems. The new logger is zero-overhead when disabled and provides compile-time filtering and structured log entries. Logging is integrated throughout the runtime, with log calls added to key validation, dispatch, and transport operations. Configuration structs now support compile-time log level control. The most important changes are grouped below:

Logging System Implementation

• Added sero/core/log.hpp, which defines the Logger class, log levels, categories, structured log entries, and a callback interface for real-time safe logging.
• Integrated the logger into the Runtime class, including a member variable, log callback setter, and propagation to all core subsystems. [1] [2] [3]

Logging Integration in Runtime Operations

• Added log calls to all major validation steps, dispatch, transport send failures, and request/response handling in Runtime, providing detailed structured logs for errors, warnings, and operational events. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]

Configuration Enhancements

• Added MinLogLevel to DefaultConfig and EmbeddedConfig, enabling compile-time control of logging verbosity and elimination of log calls when disabled. [1] [2]

Header and Dependency Updates

• Included sero/core/log.hpp in umbrella and core headers to make logging available throughout the library. [1] [2] [3]

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These changes collectively provide a robust foundation for diagnostics and observability, with minimal runtime overhead and full compile-time control.