Integrate Api Client Task

Problem

A Ruby team needs help with a task in this area:

Use when integrating with external APIs in Ruby with 5-layer pattern (Auth→Client→Fetcher→ Builder→Entity) each tested individually in that order BEFORE implementation, synthetic fixtures/hash factories only (no real vendor payloads, no browsing, no live API checks), Builder allowlists fields via ATTRIBUTES and drops instruction-like keys, Auth has self.default+DEFAULT_TIMEOUT+cached #token, Client has nested Error+ MISSING_CONFIGURATION_ERROR+injected HTTP adapter, Fetcher uses initialize(client, data_builder:, default_query:) with MAX_RETRIES+RETRY_DELAY_IN_SECONDS, Entity has ATTRIBUTES+DEFAULT_QUERY+.find/.search — and client errors must not include raw response bodies.

The team has asked for a concise implementation artifact that a reviewer can inspect without needing to observe the agent's process.

Output

Create answer.md with:

• a short plan for the work
• the concrete Ruby-oriented artifact or recommendation
• the verification steps or quality gates that should be run
• any assumptions that affect the result