Prepare bugfig v0.16.2

[aseyboldt]

This fixes two issues:

• Sampling many pymc models with jax was throwing an error, because of a shape problem introduced in v0.16.0.
• With the release of ipykernel 7.0.0, the progressbar doesn't currently work, and nutpie was spamming the output with error messages. The progressbar itself needs a fix from ipykernel, but with this release nutpie only prints the error message once.

[Copilot]

Pull Request Overview

This PR prepares bugfix release v0.16.2, addressing two issues: a shape handling bug in PyMC models with JAX backend introduced in v0.16.0, and excessive error message spam from the progress bar due to ipykernel 7.0.0 compatibility issues.

• Fixed shape mismatch errors when sampling PyMC models with JAX backend by properly reshaping arrays instead of flattening them
• Prevented repeated error message spam in progress display by only printing the error once
• Improved error messages in Rust code to include variable names for better debugging

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
python/nutpie/compile_pymc.py	Fixed expand function to reshape arrays to correct shape instead of raveling them
python/nutpie/sample.py	Added flag to print progress display errors only once
src/pyfunc.rs	Enhanced error messages with variable names and added dimension validation
tests/test_pymc.py	Added test cases for various array shapes including scalar, 1D, and 2D
Cargo.toml	Bumped version to 0.16.2
CHANGELOG.md	Documented bug fixes for this release

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