AI-powered GitHub stale issue auditor for the adk-java repository, implemented with the Google ADK for Java. Reconstructs each issue's history via GraphQL and uses Gemini to decide whether to mark it stale, close it, or remove the stale label. Runs in both interactive mode (local CLI / adk web) and unattended GitHub Actions workflow mode. Runnable via com.example.adkstale.AdkStaleAgentRun.