- 2 new migrations: summary/tags columns on kb_articles, description/requester fields on support_tickets
- handlers/kb.rs: public routes (GET /api/kb/categories|articles|articles/:slug) + admin CRUD (/api/admin/kb/*)
- handlers/support.rs: user ticket routes + admin support-cases CRUD with internal notes
- Registered all new routes in users service main.rs
- Gateway resolve_upstream: /api/kb/*, /api/support/*, /api/admin/kb/*, /api/admin/support-cases/* → users service
- scripts/seed_kb.sql: 8 categories, 28 full-length published articles covering all user roles
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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