Nathan Mares 1da1152baa MDL-72723 logs: Add get_events_select_exists to the sql_reader interface
- Updates to log stores and backup helper to improve performance when
  checking if a course has been modified.
- This is a breaking change as it adds a new function on the sql_reader
  interface.

Co-authored-by: Kevin Pham <keevan.pham@gmail.com>
2022-05-30 10:42:47 +10:00
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