ENGLISH·COURSE API
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    Module: ZodObject<
        {
            id: $ZodBranded<ZodUUID, "ModuleId", "out">;
            courseId: $ZodBranded<ZodUUID, "CourseId", "out">;
            slug: $ZodBranded<ZodString, "Slug", "out">;
            title: ZodString;
            sequence: ZodNumber;
        },
        $strip,
    > = ...

    A grouping of related Lessons within a Course.

    A Module belongs to exactly one Course; a Lesson belongs to exactly one Module. sequence orders modules within a course (1, 2, 3, ...).