f0ae5ae Do not use datagrepper's contains, but filter locally, and submit a delta

Authored and Committed by puiterwijk 2 years ago
    Do not use datagrepper's contains, but filter locally, and submit a delta
    
    This moves compute time and memory usage from the datagrepper server to the system running
    the fedimg_vars scripts.
    Without delta, we were asking the datagrepper database to check every message since
    datanommer was started for the first time.
    With contains, we ask postgres to perform a heavy string comparison operation.
    
    Signed-off-by: Patrick Uiterwijk <patrick@puiterwijk.org>