Modify CDK Step Functions Workflows

Workflow Architecture

cdk/lib/constructs/
├── review-processor.ts         # Review workflow (3-step)
├── checklist-processor.ts      # Checklist workflow (5-step)
├── agent.ts                    # AgentCore infrastructure
└── lambda/invoke-agent/        # Agent invocation Lambda

ReviewProcessor Flow

1. Prepare Review - Fetch checklist items
2. Process All Items (Map State) - Parallel: pre-process -> AgentCore -> post-process
3. Finalize Review - Aggregate results

Config: maxConcurrency default 1, timeout 2 hours