Fix missing chapter ordering

src/videoag_common/objects/course.py

@@ -197,6 +197,7 @@ class Lecture(DeletableApiObject, VisibilityApiObject, ApiViewPermissionsObject,
     chapters: Mapped[list[Chapter]] = relationship(
         back_populates="lecture",
         primaryjoin=lambda: sql.and_(Chapter.lecture_id == Lecture.id, Chapter.has_access(is_mod=True)),
+        order_by=Chapter.start_time.asc(),
         lazy="raise_on_sql"
     )
     # noinspection PyUnresolvedReferences
@@ -208,6 +209,7 @@ class Lecture(DeletableApiObject, VisibilityApiObject, ApiViewPermissionsObject,
     public_chapters: Mapped[list[Chapter]] = relationship(
         back_populates="lecture",
         primaryjoin=lambda: sql.and_(Chapter.lecture_id == Lecture.id, Chapter.has_access(is_mod=False)),
+        order_by=Chapter.start_time.asc(),
         lazy="raise_on_sql",
         viewonly=True
     )