Initial release: async healthcheck monitoring with JSON output.
Features
BaseMetricandInfoMetrictypesMonitorwithadd_metric()andmetric()APIJSONMonitorFormatterfor JSON serializationFileMonitorOutputfor writing metrics to filesMemoryMonitorStoragefor in-memory metric storage
Note: This version is archived. The current main branch contains a complete rewrite with Pull/Push architecture, multiple metric types, and Prometheus support.