feat: Multivariate Anomaly Detection

[ab93]

Additions:

• Beta VAE to balance the KLD and Log likelihood loss
• RobustMahalanobis Distance for multivariate thresholding
• Percentile based thresholding with aggregation
• Allow a tag suffix in docker workflow when using the github UI
• Exponential moving average in postprocess output
• Introduce pytests instead of unittests for newer test cases
• Improve synthetic anomaly generator module
• Per feature anomaly score when using certain thresholding models
• Score config for different feature and window aggreation methods

Removal:

• backtesting cli tool (since this will be added in a separate backtesting tool UI)

[codecov[bot]]

Codecov Report

Attention: 57 lines in your changes are missing coverage. Please review.

Comparison is base (2d84876) 93.40% compared to head (644875d) 92.31%. Report is 1 commits behind head on main.

Files	Patch %	Lines
numalogic/backtest/_prom.py	62.12%	20 Missing and 5 partials :warning:
numalogic/synthetic/anomalies.py	69.23%	7 Missing and 1 partial :warning:
numalogic/transforms/_stateless.py	81.57%	3 Missing and 4 partials :warning:
numalogic/models/threshold/_median.py	85.36%	3 Missing and 3 partials :warning:
numalogic/config/factory.py	73.33%	4 Missing :warning:
numalogic/tools/data.py	50.00%	3 Missing :warning:
numalogic/udfs/postprocess.py	89.28%	1 Missing and 2 partials :warning:
numalogic/config/_config.py	94.73%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #343 +/- ## ========================================== - Coverage 93.40% 92.31% -1.10% ========================================== Files 83 82 -1 Lines 3853 3918 +65 Branches 311 325 +14 ========================================== + Hits 3599 3617 +18 - Misses 197 233 +36 - Partials 57 68 +11 ```

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[ab93]

Have you evaluated the quality difference between plain VAE v.s. conv1d VAE in anomaly detection?

Yes, conv1d has much better quantitative scores.

[ab93]

Also, I am not sure how do we test pytest files. can you add a step in README for it too.

Added some minor comments otherwise LGTM.

Simple make test will work, already in README.