Model changes to add start/end dates to courses

lms/models/lms_course.py

@@ -7,6 +7,7 @@
     - LMSCourse membership stores role information, GroupingMembership doesn't.
 """
 
+from datetime import datetime
 from typing import TYPE_CHECKING
 
 import sqlalchemy as sa
@@ -46,6 +47,12 @@ class LMSCourse(CreatedUpdatedMixin, Base):
     lti_context_memberships_url: Mapped[str | None] = mapped_column()
     """URL for the Names and Roles endpoint, stored during launch to use it outside the launch context."""
 
+    starts_at: Mapped[datetime | None] = mapped_column()
+    """The start date of the course. Only for when we get this information directly from the LMS"""
+
+    ends_at: Mapped[datetime | None] = mapped_column()
+    """The end date of the course. Only for when we get this information direclty from the LMS"""
+
 
 class LMSCourseApplicationInstance(CreatedUpdatedMixin, Base):
     """Record of on which installs (application instances) we have seen one course."""