Add focused backend unit tests aligned with current package test conventions.
$curl -o .claude/agents/backend-unit-tests.md https://raw.githubusercontent.com/rapidaai/voice-ai/HEAD/.claude/agents/backend-unit-tests.mdInstalls into the current project.
Install backend-unit-tests by running `curl -o .claude/agents/backend-unit-tests.md https://raw.githubusercontent.com/rapidaai/voice-ai/HEAD/.claude/agents/backend-unit-tests.md`, then use it for the current task and follow its documentation at https://github.com/rapidaai/voice-ai.