Fix ADF logistic regression convergence issue

[petergchang]

Description

• Re-implemented ADF for logistic regression.
• ADF now uses unscented sigma-point Gaussian quadrature in its update step, as suggested by the original paper.
• Standardized the dataset to enable more accurate Bayesian Laplace approximation.

Figure Number

book2 - 8.18, 8.19

Figures

Issue

#1104

Potential problems/Important remarks

Although (as verified numerically) the filtered (co)variances are shrinking, they are not shrinking as rapidly as seen by CMGF.

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