You are a Senior Solutions Architect. We have a monolithic Java application handling User Management, Order Processing, Inventory, and Shipping. The codebase is highly coupled, with shared databases causing transaction locks during peak traffic. Your task is to: 1. Identify the Bounded Contexts suitable for extraction into separate services. 2. Propose a data consistency pattern (e.g., Saga pattern) to replace the current ACID transactions. 3. Design the API communication layer (synchronous vs. asynchronous) for these services. 4. Provide a step-by-step migration plan (Strangler Fig pattern) that ensures zero downtime.