feat: Add LTI launch, lesson preview, course progress, bookmarks, and asset management features.

services/lms-service/migrations/20260223000000_add_preview_and_teams.sql

@@ -0,0 +1,11 @@
+-- Migration to support course previews and multi-instructor sync
+ALTER TABLE lessons ADD COLUMN is_previewable BOOLEAN NOT NULL DEFAULT FALSE;
+
+CREATE TABLE course_instructors (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    course_id UUID NOT NULL REFERENCES courses(id) ON DELETE CASCADE,
+    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role TEXT NOT NULL DEFAULT 'instructor',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    UNIQUE(course_id, user_id)
+);