fix: refactored flood to better behavior

[ErikBjare]

I've had this in my working tree for a while. Should be improved behavior better aligned with how aw-server-rust works. Will hopefully fix ActivityWatch/activitywatch#626.

(Needs thorough review, long time since I wrote this, and can't remember what I've done)

[codecov]

Codecov Report

❌ Patch coverage is 69.56522% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.16%. Comparing base (efd1325) to head (0b47c01).
⚠️ Report is 77 commits behind head on master.

Files with missing lines	Patch %	Lines
aw_transform/flood.py	69.56%	13 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #105      +/-   ##
==========================================
- Coverage   90.78%   90.16%   -0.63%     
==========================================
  Files          34       34              
  Lines        1660     1687      +27     
  Branches      257      262       +5     
==========================================
+ Hits         1507     1521      +14     
- Misses        118      131      +13     
  Partials       35       35              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ErikBjare]

Since this is based on the aw-server-rust implementation, I just want to note that it might not be without issues either: ActivityWatch/activitywatch#602