v0.4.1: Painted multi-volume 3MF assembly fix

OrcaSlicer Mobile v0.4.1

Painted Orca/Bambu 3MF project fix release.

Fixed

• Load painted multi-volume 3MF assemblies correctly.
• Accumulate paint facets across all model-part volumes with the correct instance/volume transforms.
• Adopt project filament colors from Metadata/project_settings.config when opening painted 3MF files.
• Render paint overlays for all used filament IDs, not only the current/default palette length.

Verification

• Built from commit dd3d66e with native source rebuild (:app:buildCMakeRelease[arm64-v8a]).
• Verified packaged native symbol in lib/arm64-v8a/libslic3r.so: Java_ru_ytkab0bp_slicebeam_slic3r_Native_model_1paint_1max_1filament.

APK

• File: OrcaSlicerMobile_dd3d66e1ef.apk
• SHA256: 53f197fc7421d8b307d35060496047bf9003716e765d8e6636229ef71cfa808b