feat: Implement AI tutor functionality, add branding fields, and improve API URL handling.

services/lms-service/migrations/20260123000000_add_branding_fields_to_orgs.sql

@@ -0,0 +1,4 @@
+-- Add missing branding columns to organizations table
+ALTER TABLE organizations 
+ADD COLUMN IF NOT EXISTS platform_name TEXT,
+ADD COLUMN IF NOT EXISTS favicon_url TEXT;