feat: Implement wait_for_updates action for handling delayed cases and evidence

feat: tighten EscalationROI, add ambiguous medium case, LLM note judge wrapper

feat: Implement multi-round dispute lifecycle with arbitration scoring and related tests

feat: Implement Issuer agent for multi-round dispute lifecycle

Refactor evidence building and improve code readability in iso_adapter.py

refactor: build grading on OpenEnv Rubric system

feat: add card network metadata, trim README, add limitations section

fix: address Codex adversarial review findings

feat: add Gradio demo UI, realistic metadata, info dict, and metrics

refactor: update all imports for new directory structure

feat(connectors): add Stripe sandbox connector for dispute processing

feat: add core chargeback environment