NRT ("update" files)

[zmoon]

Closes #20

• [x] fix title
• [x] coverage
• [x] example in nb getting an hourly period, de-duping and cutting off earlier, showing how much removed

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.53%. Comparing base (e82e42d) to head (5be71f9).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #31 +/- ## ========================================== + Coverage 98.70% 99.53% +0.82% ========================================== Files 4 4 Lines 465 650 +185 ========================================== + Hits 459 647 +188 + Misses 6 3 -3 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.