Detector v2

[LDiazN]

This PR will implement the new changepoint detection algorithm highlighted on https://docs.ooni.org/data/pipeline-implementation-plan/#36-cell-state-as-a-rule-histogram

The new detector is based on the new histogram-based cell and the two-weight Bernoulli increment for the CU-SUM calculation

A new page is created for this detector panel to compare with results from the original detector

The detector runs on a fixed window rather than resuming from an old run, like the old version.

Experimenting with my local setup, we can compute a 60 days window in nearly 20 minutes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.36%. Comparing base (c8fcc72) to head (d5c0338).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #184      +/-   ##
==========================================
- Coverage   83.24%   82.36%   -0.88%     
==========================================
  Files          89       91       +2     
  Lines        5788     6067     +279     
==========================================
+ Hits         4818     4997     +179     
- Misses        970     1070     +100     

Flag	Coverage Δ
oonidata	77.87% <ø> (ø)
oonipipeline	84.47% <ø> (-1.48%)	⬇️

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