Problem/Motivation
Menu links don't have changed time tracking. See various reasons why this is a problem at #2074191: [META] Add changed timestamp tracking to content entities .
Proposed resolution
Add change time tracking to menu links.
Remaining tasks
Needs upgrade path.
User interface changes
None.
API changes
Schema changed. New getChangedTime method added. This naming is already used on other entity types. See #2044583: Add EntityChangedInterface to allow entities with "changed" field to be properly cached for unification of this.
Related Issues
#2044583: Add EntityChangedInterface to allow entities with "changed" field to be properly cached
#2074191: [META] Add changed timestamp tracking to content entities