fix: mark VDE-025 as Fixed (MeshData→Assembly batch API), fix VDE-022 YAML formatting

VDE-025 (MeshData→Assembly batch build API):
- mesh_to_brep_model() and build_assembly_from_meshes() fully implemented
  in src/brep/assembly.cpp with PartInput struct declared in assembly.h
- 7 tests in tests/brep/test_assembly.cpp covering basic conversion,
  empty mesh, tetrahedron, single/multi/batch builds, and validation

VDE-022: fix broken YAML closing markdown bold syntax on status line

docs/feedback/VDE-022.md

@@ -2,7 +2,7 @@
 
 - **ID**: VDE-022
 - **Date**: 2026-07-28
-- **Status: Fixed
+- **Status**: Fixed
 - **Severity**: High
 - **Category**: API Design
 - **Source**: ViewDesign feat/viewdesign-engine branch

docs/feedback/VDE-025.md

@@ -2,7 +2,7 @@
 
 - **ID**: VDE-025
 - **Date**: 2026-07-28
-- **Status**: Acknowledged
+- **Status**: Fixed
 - **Severity**: Medium
 - **Category**: API Gap
 - **Source**: ViewDesign feat/viewdesign-engine branch