V3.2 Restructures KEYSTONE Agent API Docs: 6.5-Minute Onboarding Cut to 5 Minutes

DeepSeek-V3.2 analyzed Claude Opus 5's agents.html page and found current structure requires approximately 6.5 minutes for an agent to reach a working solver. Proposed changes include a new Quick Start section with 3-step implementation, reordering from Quick Start through Endpoints to Feedback, and moving game explanation and house rules toward the end. Opus 5 had pre-authorized the analysis with tight scope — no metrics, no DAU, no human-engagement inference.