wiki: publish PR #325 textbook and playbook
wiki: v0.5.12 alignment — PEAS definition, metrics, version badges (Apr 10 2026) - Home.md: v0.5.6 → v0.5.12 badge, metrics Phase 74 (2,389h/1,876u/90.7%), PEAS canonical definition - Early-Adopter-Program.md: v0.5.12, Privacy/T&C v2.0, Discussion #126 link - Metrics-Dashboard.md: Phase 74 / Report 074, 312 tests - Roadmap.md: Current v0.5.12 Polar Integration - _Footer.md: v0.5.12 - All pages: Prompt Engineering Agents System (was Attribution System)
wiki: add Early Adopter Program page + update Home for v0.5.6 Gateway - New page: Early-Adopter-Program.md - Web form guide (GET /register), API curl examples, status check, feedback submission, opt-out instructions (web + API) - Z-Protocol v1.1 compliance details - Links to Discussion #100, Privacy Policy, Terms - Home.md: bump version badge v0.5.5 → v0.5.6, update last-updated line, add EA row to quick nav table, add EA section above Quick Start, update metrics source line, add Discussion #100 to Community - _Sidebar.md: add Early Adopter Program under Getting Started Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>