docs: mirror OpenWA v0.25 sync (idempotency keys, error surfacing, message.receipt)
docs: mirror OpenWA v0.23.7 sync (click_button, commerce types, prompt taps)
docs: mirror PR review fixes (phantom stats, deprecation wording, changelog)
docs: document OpenWA v0.19-v0.23 whitelisted methods - API-Reference: add 19 new whitelisted methods (message/chat/session/ group/status/channel ops) + mark_chat_read messageIds + send_catalog_message deprecation - Changelog: v0.19-v0.23 API contract support + test-compile fix - Message-Flows: add Flow 15 (v0.19-v0.23 whitelisted methods) - Home: update Features at a Glance
Add comprehensive wiki pages: Installation, Configuration, Architecture, API Reference, Message Flows, Custom Fields, Troubleshooting, Changelog