The `ProcessTracker` struct (within this module) manages per-process energy records, filtering by top consumers, and tracking CPU usage shares. It is a self-contained data structure that can be extracted and reused in any power monitoring or resource accounting system. It demonstrates non-obvious skill in efficiently handling process state over time without external dependencies beyond basic Rust primitives.

The `MetricGenerator` trait and `Metric` struct define a reusable pattern for collecting and aggregating metrics from various sources (host, socket, process, self) into a uniform vector. This trait decouples metric production from export, enabling any exporter to use the same collection logic. It can be extracted as a standalone metric collection framework for monitoring agents.

This module provides a simple, self-contained unit conversion system for energy (microjoules, millijoules, joules) and power (microwatts, milliwatts, watts). It implements `From` and `Into` traits for safe scaling. It is a pure utility that can be reused in any project requiring energy/power unit operations without modification.