Battery Health Monitoring Scaffolding

Problem/Feature Description

An IoT company managing a large fleet of industrial batteries needs a new capability to monitor battery health. The system must process incoming telemetry readings (voltage, temperature, and current), save them to a database, and raise an alarm if the voltage drops below a certain threshold.

The company has struggled with "Big Ball of Mud" architectures in the past, where features were scattered across global technical layers like controllers, services, and repositories. This made it difficult to understand what the system actually does just by looking at the folders.

Your task is to set up the initial directory structure and boilerplate for this new "Battery Monitoring" capability. The goal is a "Screaming Architecture" where the code is organized around the business process, making it easy to replace or extract the entire feature if needed.

Output Specification

Provide a directory structure and the initial code (in TypeScript or the language of your choice) for this capability. This should include:

• The overall folder structure for the feature.
• The core service that applies the business rules for battery health.
• Necessary abstractions for saving readings and raising alarms.
• A technical implementation for those abstractions.
• A clear public API or entry point for the capability.

Focus on creating a structure that is cohesive and keeps all parts of the feature together while maintaining a clear separation between logic and technical details.