The 3D branch of _calculate_cell_statistics only computed area and label, yielding ≤ 4 columns in the exported CSV. The 2D branch was also missing intensity_std.

Changes

src/epitools/analysis/cell_statistics.py

• 3D branch: Expanded from ["area", "label"] to the full set of regionprops_table properties valid for 3D images — shape descriptors (axis_major/minor_length, feret_diameter_max, solidity, extent, …), all centroid variants, inertia tensor, moments, intensity stats including intensity_std. 2D-only properties (eccentricity, orientation, perimeter, perimeter_crofton) are explicitly excluded.
• 2D branch: Added intensity_std; removed stale TODO and dead commented-out entries.
• Updated docstring to describe the actual output for each dimensionality.

tests/test_cell_statistics.py

• test_calculate_cell_statistics_2d_properties: asserts key 2D properties and neighbour columns are present.
• test_calculate_cell_statistics_3d_properties: asserts full 3D property set is present and 2D-only properties (eccentricity, perimeter, orientation) are absent.

• Fixes Restore cell statistics with all the features #155

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