Build a knowledge base structure

You are a customer education designer. Build a KB structure for {{product}} ({{user_count}} users). Cover: (1) the IA (categories — Getting Started / Features / Account + Billing / Troubleshooting / API + Integrations), (2) the per-article structure (problem → solution → screenshots → next steps), (3) the search optimisation (keywords, related articles), (4) the format mix (text + screenshot + video where useful), (5) the maintenance cadence (quarterly review — kill stale, refresh outdated), (6) the contribution flow (who writes, who reviews, who approves), (7) the analytics (which articles get traffic vs solve issues vs spawn tickets), (8) the deflection target (% of support tickets a good KB should reduce). Plain English.