- Updated helios-core to v1.3.90

## Global
- Added `Global.blackbodyBandFraction(wavelength_min_nm, wavelength_max_nm, temperature_K)`, the fraction of blackbody emissive power emitted between two wavelengths
- Added `Global.blackbodySpectralRadiance(wavelength_nm, temperature_K)`, the Planck spectral radiance in W/m²/sr/nm

## Solar Position
- Added `SolarPosition.setOzoneColumn()` and `getOzoneColumn()`, setting and reading the total column ozone used by the solar flux and spectral models
- The ozone column now defaults to a monthly zonal-mean climatology in place of an empirical formula that was wrong in the Southern Hemisphere
- Added `SolarPosition.setGroundAlbedo()` and `getGroundAlbedo()`, the ground albedo used by the spectral solar model (default 0.2)
- Added `SolarPosition.calculateSensorAtmosphereSpectra(label, direction_to_sensor, resolution_nm=1.0)`, storing the path radiance, transmittances and ground irradiance needed to simulate imagery from a sensor above the atmosphere
- Added `SolarPosition.calculateSensorThermalAtmosphere(label, direction_to_sensor)`, storing the thermal infrared (5.5-15.3 um) transmittance and atmospheric radiance between the scene and such a sensor
- Added `SolarPosition.getThermalSkyFlux(wavelength_min_nm, wavelength_max_nm)`, the clear-sky longwave irradiance within a thermal band
- The spectral solar model (`calculateGlobalSolarSpectrum()`, `calculateDirectSolarSpectrum()`, `calculateDiffuseSolarSpectrum()`) was reimplemented and its spectra differ from previous versions
- Fixed the spectral solar model returning NaN spectra when relative humidity was zero; it now raises
- `getSolarFlux()` and related methods now raise poleward of 80 degrees and in high-latitude winter, where the ozone climatology has no data, unless `setOzoneColumn()` is called
- The Prague sky model now reads turbidity as Ångström's β like the other models, changing its visibility by up to about 6.5%
- Corrected the documentation of `turbidity`: it is Ångström's β, the aerosol optical depth at 1 um, not at 500 nm
- Fixed the spectral solar model failing when the working directory was not the build directory
- Fixed wheels omitting the solar spectrum, ozone climatology and atmosphere look-up tables that SolarPosition loads at runtime

## Radiation
- Added `RadiationModel.enableCameraAtmosphere(camera_label, atmosphere_label)` and `disableCameraAtmosphere(camera_label)`, converting a camera's images to the radiance at a sensor above the atmosphere
- An emission band added with wavelength bounds now emits only the in-band part of the Planck spectrum rather than the full broadband flux
- Radiation cameras now see through translucent covers (`glass_n_<band>`) instead of treating them as opaque
- Fixed translucent covers recording all the radiation striking them as absorbed
- A `reflectivity_<band>` or `transmissivity_<band>` value of 0 now overrides a spectrum instead of being ignored
- `runBand()` now raises when a reflectivity or transmissivity spectrum does not overlap the band
- `runBand()` now raises when a source has flux in a band where its spectrum has no energy
- Diffuse, scattered and emitted radiation now use surface properties weighted by the band's combined incident spectrum rather than by source 0's
- The source- and camera-weighted `integrateSpectrum()` forms now raise instead of returning NaN when there is nothing to weight by
- The maximum number of radiation sources is now 255
- Fixed `addRadiationBand()` and `copyRadiationBand()` rejecting a lower wavelength bound of 0 nm and any bound below 100 nm
- Fixed `copyRadiationBand()` rejecting bounds of `(0, 0)`, which create a band without wavelength bounds

## Plant Hydraulics
- Added the `PlantHydraulicsModel` class, binding the Helios plant hydraulics plug-in for soil, root, stem and leaf water potentials, turgor pressure, osmotic potential and relative water content
- Added `PlantHydraulicsModelCoefficients`, `HydraulicConductance` and `HydraulicCapacitance` for setting leaf, stem and root conductance and capacitance, including leaf capacitance from the species library
- Added `PlantHydraulicsModel.computeWaterPotential()`, `computeTurgorPressure()`, `computeOsmoticPotential()`, `computeConductance()` and `computeCapacitance()` for evaluating pressure-volume and vulnerability curves
- Added `PlantHydraulicsModel.getModelCoefficients(UUID)`, reading back the coefficients set for an individual primitive
- Added `PlantHydraulicsModel.getModelCoefficientsFromLibrary(species)`, reading a species' coefficients from the library
- Added `docs/examples/planthydraulics_wilting_movie.py`, a movie of a tomato plant wilting and recovering over a day as its leaf angles and petiole droop follow the computed turgor pressure

## Plant Architecture
- Added `PlantArchitecture.setLeafAngleDistribution(plant_ids, beta_mu, beta_nu, eccentricity=None, ellipse_rotation_degrees=0)`, re-aiming the leaves of a finished plant onto a Beta inclination distribution and, optionally, an ellipsoidal azimuth distribution
- Added `PlantArchitecture.getPetioleFlexibility()` and `setPetioleFlexibility()`, reading and replacing the petiole flexibility of an existing phytomer
- Added `include_posed_leaves` to `bendPetioleUnderLeafWeight()`, bending a petiole whose leaves have been posed
- Added `peduncle.yaw` to the phytomer parameters, turning a peduncle about its parent internode away from the leaf axil
- `writePlantStructureUSD()` replaces `damping_ratio` with `damping_time_constant`; passing `damping_ratio` raises, and parameters after `wood_density` are now keyword-only
- Added `armature_stability_ratio` and `physics_steps_per_second` to `writePlantStructureUSD()`
- Fixed plants exported with `writePlantStructureUSD()` collapsing when simulated in IsaacSim
- `setPhytomerCreationFunction()` and `setPhytomerCallbackFunction()` now accept the name of a library function, such as `"AlmondSpurPhytomerCallbackFunction"` or `"GrapevinePhytomerCallbackFunction"`
- Added `PlantArchitecture.getPhytomerCreationFunctionName()` and `getPhytomerCallbackFunctionName()`, naming the library function a shoot type carries
- Added `PlantArchitecture.getLibraryPhytomerCreationFunctionNames()` and `getLibraryPhytomerCallbackFunctionNames()`, listing the library functions that can be installed by name
- `pruneBranch()` can now be called from a phytomer callback; the cut is applied at the end of the time step
- `advanceTime()`, `deletePlantInstance()` and `loadPlantModelFromLibrary()` now raise when called from a phytomer callback, as do the methods that add shoots or plants
- Fixed `buildPlantInstanceFromLibrary()` rejecting every build parameter of the `grapevine_Wye` model
- The `grapevine_Wye` build parameter `trunk_height` is now the height of the cordon wires (default 1.4 m) rather than the trunk length
- `grapevine_Wye` rows now run along the y-axis instead of x, so existing Wye layouts need turning by 90 degrees
- The `pistachio` model was recalibrated against LiDAR-measured trees and grows differently from previous versions
- The `pistachio` model now trains itself by heading its scaffolds and their secondaries
- Fixed the `pistachio` model building only 4 scaffolds for a `num_scaffolds` of 5 to 8
- The `almond` model now grows spurs, and carries more leaf area
- Fixed the `grapevine_VSP` model never bearing fruit
- The `grapevine_VSP` and `grapevine_Wye` models now pull their fruit-zone leaves at fruit set
- Corrected the leaf arrangement (`phyllotactic_angle`) of the `tomato`, `cherrytomato`, `walnut`, `strawberry` and `wheat` models
- The `puncturevine` model now bears its leaves in opposite pairs
- Fixed lateral shoots sharing one draw of `internode_length_max`, `base_roll` and `insertion_angle_tip` when these are distributions; models that use one grow differently
- Shade-driven branch shedding now judges a branch by the mean light on all the foliage it supports
- Fixed `readPlantStructureXML()` rebuilding curved stems along a different path than the plant that was written