- Updated helios-core to v1.3.92

## Context
- Added `Context.getGeometryRevision()`, a counter that advances whenever a primitive is modified or deleted
- Added `Context.getShapeRevision()`, a counter that advances only when a primitive is moved, reshaped, re-textured or deleted
- Fixed `writeOBJ()` writing `primitive_dat_fields` rows out of order with the faces when primitives carry `object_label` data, as plants from PlantArchitecture do
- `writeOBJ()` now raises before writing anything when a primitive lacks a requested `primitive_dat_fields` label or that data is not a scalar
- Fixed `writeOBJ()` silently writing a truncated `.obj` file in builds without OpenMP or with a limited thread count
- `writePrimitiveData()` now raises when the output file cannot be opened

## Annotation
- Added the `pyhelios.annotation` module, writing YOLO bounding boxes and COCO segmentation masks from any pixel-to-primitive map: `labelBoundingBoxes()`, `writeLabelBoundingBoxes()`, `labelMasks()` and `writeLabelSegmentationMasks()`

## Visualizer
- Added `Visualizer.writeImageBoundingBoxes()` and `writeImageSegmentationMasks()`, writing YOLO boxes and COCO masks for the current view from primitive or object data labels
- Added `Visualizer.getDepthImage()`, the distance from the camera to the visible surface in each pixel
- Added `Visualizer.writeDepthImageData()`, `writeDepthImageDataEXR()` and `writeNormDepthImage()`, writing that depth image to a text, EXR or grayscale JPEG file
- Added `Visualizer.getPixelUUIDs()`, the primitive visible in each pixel of the current view
- Fixed `getDepthMap()` returning only part of the depth map on a high-DPI display
- Fixed Context voxels being drawn as a single rectangle instead of a box
- Corrected the documentation of `setLightDirection()`: the vector points from the scene toward the light

## Radiation
- Added `RadiationModel.enableBelowHorizonDiffuseRadiation()` and `disableBelowHorizonDiffuseRadiation()`
- **Behavior change:** diffuse sky radiation now fills only the upper hemisphere, so isolated objects and the edges of finite domains receive less diffuse flux; `enableBelowHorizonDiffuseRadiation()` restores the previous behavior
- Added `RadiationModel.enableScatteringRayReduction()` and `disableScatteringRayReduction()`; later scattering iterations now launch fewer rays by default
- Fixed `runBand()` overestimating absorption in scattering bands by absorbing the energy left after the last iteration in place
- `setMinScatterEnergy()` now takes effect (it previously did nothing) and accepts a threshold of 0, the default
- `getSkyEnergy()` is deprecated and now raises; it always returned 0
- `runBand()` now rebuilds the geometry automatically when primitives have been moved, rotated, scaled or reshaped since the last run
- Added the `invisibility_flag` primitive data, which hides a primitive from the radiation model
- Seeding the Context with `seedRandomGenerator()` now makes `runBand()` fluxes and camera images reproducible
- **Behavior change:** rays now wrap through periodic boundaries up to 999 times, so low-sun-angle fluxes in narrow periodic domains are no longer too low
- **Behavior change:** the period of a periodic domain is now exactly the width of the geometry's bounding box, closing a 20 µm gap between neighbouring copies
- Fixed a radiation camera placed laterally outside a periodic domain disabling periodicity for the whole model
- Fixed a radiation camera above or below a periodic domain changing the radiation fluxes
- `updateGeometry()` now raises for scenes containing voxels on every backend
- `updateGeometry()` now raises for a triangle with a transparency-channel texture but no texture (u,v) coordinates
- `runBand()` now raises when a band's scattered energy does not decrease between its last two iterations
- Fixed one-sided primitives emitting twice the direct radiation they scattered
- Fixed repeated `runBand()` calls on the Vulkan backend giving increasing fluxes for diffuse-only or emission-only scattering bands
- Fixed sparsely texture-masked primitives absorbing far too little radiation on the Vulkan backend
- Fixed primitives with `twosided_flag` 3 still blocking rays on the OptiX 8 and Vulkan backends
- Fixed bounding boxes and segmentation mask `bbox` values from camera annotation methods ending one pixel short of the object
- Fixed `writeImageSegmentationMasks()` attaching another object's attribute values to masks when the image held very small labeled regions
- Sped up diffuse, emission and scattering calculations on the Vulkan backend by about 2x
- Added `RadiationModel.applyCameraImageCorrections()`, adjusting a camera image's brightness, contrast and saturation
- Added `RadiationModel.applyCameraColorCorrectionMatrix()`, applying a color correction matrix file such as the one written by `autoCalibrateCameraImage()`

## LiDAR
- Added `LiDARCloud.getScanRecordPartialMisses()` and `setScanRecordPartialMisses()`, controlling whether a partly intercepted multi-return pulse also records a miss point
- The default synthetic-scan detection threshold is now 0.001 instead of 0.05

## Leaf Optics
- Added nitrogen-based automatic leaf spectra: `LeafOptics.run()` with `LeafOpticsProperties_Nauto` derives each leaf's pigments from its `leaf_nitrogen_gN_m2` object data
- Added `LeafOptics.updateNitrogenBasedSpectra()`, updating nitrogen-based spectra after leaf nitrogen changes

## Energy Balance
- Fixed transpiration of two-sided primitives being overestimated, giving leaf temperatures that were too low
- **Behavior change:** `EnergyBalanceModel.run()` now raises when the same UUID appears more than once

## Photosynthesis
- Fixed `net_photosynthesis` and `Ci` being overestimated for two-sided leaves
- **Behavior change:** the CO₂ conductance now uses the conventional ratios of 1.6 (stomatal) and 1.37 (boundary layer), lowering light-saturated assimilation by about 5%
- Stomatal sidedness now falls back to the `evaporating_faces` primitive data when `stomatal_sidedness` is not set

## Stomatal Conductance
- Fixed leaf-surface humidity and CO₂ of two-sided primitives using the boundary-layer conductance of both faces
- **Behavior change:** the default boundary-layer conductance when none is set was raised from 0.1 to 1.0 mol/m²-s
- Added a `material_label` argument to the `StomatalConductanceModel` coefficient setters and `setBMFCoefficientsFromLibrary()`, assigning coefficients to every primitive with that material
- `setBMFCoefficients()` now accepts a list of coefficients, one per UUID
- Added `StomatalConductanceModel.getBMFCoefficientsFromLibrary(species)`
- `setBMFCoefficients()` now accepts `b = 0`, as used by some library species

## Plant Architecture
- Fixed `buildPlantCanopyFromLibrary()` ignoring its `build_parameters`
- Fixed shoots growing through large obstacles such as the ground or a wall when obstacle avoidance was enabled
- Fixed the lateral leaflets of the bean and cowpea models being mirrored about their midrib
- Petioles of emerging leaves are no longer thinner than three tenths of their full radius
- Redrew the cowpea embryonic leaf image as symmetric about its midrib
- Added `PlantArchitecture.determinePhenologyStage()`, returning a plant's current phenological stage
- Added `PlantArchitecture.getPlantInternodeObjectIDs()`, optionally limited to one shoot type
- Added `PlantArchitecture.getPlantLeafInclinationAngleDistribution()` and `getPlantLeafAzimuthAngleDistribution()`, histograms of a plant's leaf angles
- Added `PlantArchitecture.getPlantBasePosition()` and `setPlantBasePosition()`; setting the position affects only shoots added afterward
- Added `PlantArchitecture.getPlantStemHeight()`, `getPlantName()` and `getShootNodeCount()`

## Weber-Penn Tree
- Added `WeberPennTree.getTreeParameters()` and `setTreeParameters()` with the `WeberPennTreeParameters` class, allowing species parameters to be read, modified, or defined under a new name
- Added `WeberPennTree.seedRandomGenerator()`, making generated trees reproducible