Don't count in progress events as duplicates

[NickM-27]

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[skrashevich]

        duplicate_query = """select id, camera, has_snapshot, has_clip
from (
    select id,
        camera,
        has_snapshot,
        has_clip,
        end_time,
        row_number() over (
            partition by label, camera, round(start_time/5,0)*5
            order by end_time-start_time desc
        ) as copy_number
    from event
    where end_time is not null
) subquery
where copy_number > 1;"""