Changelog entry for abTEM#499 (backscattering, full expansion, detectors)

[pzeiger]

Changelog entry for abTEM#499, which is still open. The changelog lists only changes that are merged into dev, so this should merge after abTEM#499 does.

One entry under Bugfixes:, after the PR #346 entry, with one sub-bullet per fix: backscattered waves of ensemble potentials, the full-expansion correction term at chunk boundaries, the full-expansion series on a zero wave, the output declarations of PixelatedDetector(reciprocal_space=False) and WavesDetector(gpts=...), SegmentedDetector(outer=None), the slice count of build(first_slice, last_slice), block_direct() and GPAW's sys.stdout. The last sub-bullet marks the one behaviour change: an AnnularDetector with outer=None now integrates to min(waves.cutoff_angles), which shifts detected values by up to 1.2e-3 relative.

#35 adds entries to the same Bugfixes: list; whichever merges second needs the other's lines kept.

🤖 Written and posted by Claude Code on Paul's behalf