v17.1.0

Feature

• Outstream operator for TrackStatePropMask (#1165) (b7d2de0) (@paulgessinger)
• Scale backward filtering covariance (#1147) (b8abfb5) (@Corentin-Allaire)
• Implement iterator support for k-d trees (#1158) (20d23f1) (@stephenswat)
• Python particle gun and Fatras examples can be chained (#1128) (ece76d4) (@timadye)

CI

• Lock dependencies for python-level tests (#1163) (f407b53) (@paulgessinger)

Performance

• Replace std::pow(x, 0.25) with std::sqrt(std::sqrt(x)) (#1150) (de6af39) (@paulgessinger)

Refactor

• Add method to reset jacobian in stepper (#1171) (f9dbc02) (@Corentin-Allaire)

Fix

• Covariance expansion with expander (#1164) (9294d61) (@paulgessinger)
• Reset the stepper Jacobian in the KF smoothing (#1152) (41553e7) (@Corentin-Allaire)
• Maybe uninit warning in KDTree (#1162) (73173e0) (@paulgessinger)
• Delete assignment operator for internal SPs (#1160) (eb51e5b) (@stephenswat)
• Add constant qualifiers to seed finder utilities (#1159) (c305fc4) (@stephenswat)
• ATLAS beampipe radius in itk.py (#1157) (78c8f4a) (@timadye)
• Updating itk description in python, fixes issue #1149 (#1155) (5220f82) (@noemina)
• Make ITk splitting json entry optional (#1156) (b8c3a38) (@niermann999)