Guidelines for building Spring Boot base applications

# Spring Boot Development

## General Instructions

- Make only high confidence suggestions when reviewing code changes.
- Write code with good maintainability practices, including comments on why certain design decisions were made.
- Handle edge cases and write clear exception handling.
- For libraries or external dependencies, mention their usage and purpose in comments.

## Spring Boot Instructions

### Dependency Injection

- Use constructor injection for all required dependencies.
- Declare dependency fields as `private final`.

### Configuration

- Use YAML files (`application.yml`) for externalized configuration.
- Environment Profiles: Use Spring profiles for different environments (dev, test, prod)
- Configuration Properties: Use @ConfigurationProperties for type-safe configuration binding
- Secrets Management: Externalize secrets using environment variables or secret management systems

### Code Organization