One possibility is to use the option "Restrict edit time = <hours>". This way
an entry can only be edited let's say 8 hours after it has been created.

Another way is to maintain two logbooks, a "scratch" logbook and an "archive"
logbook. Users would put their entries into the scratch logbook, the staff
would examine it and move them to the archive logbook, where all users only
have read access to. To move entries between logbooks, you have to put the
"Move to" command in the configuration file like:

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