Implement a REST Endpoint That Aggregates Data from Multiple Internal Services

Design and implement a GET /api/bootstrap REST endpoint that accepts a user_id and aggregates data from multiple internal services (Consumer, Address, Payments) into a single consolidated response. The endpoint must handle independent service failures gracefully and return only production-ready fields — no debug or internal-only data should be exposed. Focus areas include API contract design, data modeling, service orchestration, and clean error handling.