honor material texture addressing in Vulkan

Vulkan never read the material's texture addressing, so MR_FORCE_CLAMP
skyboxes were sampled with a wrapping sampler, producing seams.  Set it
on every material draw, as OpenGL does in opengl_tnl_set_material().

Co-Authored-By: Claude Opus 5.5 <[email protected]>

code/graphics/vulkan/VulkanDraw.cpp

@@ -1281,6 +1281,9 @@ bool VulkanDrawManager::applyMaterial(material* mat, primitive_type prim_type, v
 
 	m_frameStats.applyMaterialCalls++;
 
+	// Like opengl_tnl_set_material(), every material draw sets the texture addressing (e.g. MR_FORCE_CLAMP skyboxes)
+	setTextureAddressing(mat->get_texture_addressing());
+
 	// Build pipeline configuration from material
 	PipelineConfig config = buildPipelineConfig(mat, prim_type);