Lagrange Release 6.45.0

Infrastructure

• 🏗️ Fix sccache CMake flags for open-source CI.
• 🐛 Fix sanitizer presets: TSan ASLR workaround + LSAN suppressions.
• 🐛 Fix std::format custom formatter on MSVC 14.50 + CI VS 2026 toolset.

Core Module

• 🧪 Add orient_outward regression test.
• 📝 Add orient_outward example and use barycenter anchor for signed-volume robustness.
• ♻️ Modernize mesh_cleanup example to use SurfaceMesh API.
• 🐛 Disconnect bowtie UV vertices in disconnect_uv_charts.
• 🎨 Add compute_uv_orientation and unflip_uv_charts: per-facet orientation attribute via Shewchuk's exact predicate; wired into Python, meshstat, and texproc.

Raycasting Module

• ✨ Remove occluded meshes and faces using ray casting: instance- and facet-level occlusion estimation/removal for CAD interior cleanup.

Texproc Module

• 🎨 Add CameraTransforms, split_grid, and mesh+cameras rasterizer overload: decouples rasterizer from Scene; promotes CameraTransforms to core with Python binding.

PolyDDG Module

• 🐛 Fix anti-aligned result in compute_smooth_direction_field.
• ✨ Add face-based connection Laplacian to compute_smooth_direction_field.

Primitive Module

• 🐛 Handle empty attribute names in generate_sphere and generate_rounded_cone.

Python & Scripts

• 🐍 Add Python bindings for packing::repack_uv_charts.
• 🐍 Add Python bindings for scene::compute_mesh_weights.
• 🐍 Refactor meshstat into a package and add UV statistics.
• 🐍 Expand Python bindings for volume.Grid: CSG ops, transforms, factories.