REST API Controller Copilot Rules

- [x] Verify that the copilot-instructions.md file in the .github directory is created.
	- File created with required instructions.

- [x] Clarify Project Requirements
	- Requirements defined by user: Spring Boot REST API with /balance endpoint and Kafka listener integration.

- [x] Scaffold the Project
	- Spring Boot Maven project skeleton created with REST/Kafka modules.

- [x] Customize the Project
	- Added Kafka listener, balance service, REST controller, and persistence configuration per requirements.

- [x] Install Required Extensions
	- No extensions recommended for this project type.

- [x] Compile the Project
	- Installed Maven and ran `mvn -DskipTests package` successfully.

- [x] Create and Run Task
	- No custom VS Code task required for Maven workflow.

- [ ] Launch the Project
	- Awaiting user request before starting the application.

- [x] Ensure Documentation is Complete
	- README.md updated; copilot instructions cleaned of HTML comments.

Execution Guidelines
- Work through each checklist item systematically.
- Keep explanations concise; skip unnecessary command output.
- Use the current directory as the working root for commands.
- Avoid installing extensions unless explicitly requested.
- Provide launch/debug instructions once the user requests them.