Following workitem from SpecializationConstants.md has been implemented:

2. Name -> SpecId matching policy

   • Match SpecializationConstant::Name to reflected specialization constant names from SPIR-V.
   • Scope matching by shader module and stage mask (ShaderStages).
   • Validate uniqueness and type/size compatibility.
   • Define clear error messages for:
     • name not found in target shader module
     • duplicate bindings
     • size/type mismatch

3. Populate Vulkan structs during PSO creation

   • In Vulkan pipeline state creation flow, build per-shader-module specialization data:
     • std::vector<VkSpecializationMapEntry>
     • contiguous data blob (std::vector<Uint8>)
     • Populate VkSpecializationInfo
   • Attach StageCI.pSpecializationInfo for each VkPipelineShaderStageCreateInfo.
   • Ensure memory lifetime is valid until Vulkan vkCreate*Pipelines call returns.
   • Primary integration file:
     • Graphics/GraphicsEngineVulkan/src/PipelineStateVkImpl.cpp

4. Pipeline coverage

   • Cover all Vulkan PSO paths that use shader stage create infos (graphics/compute/ray tracing as applicable).

5. Tests for stage 2

   • Add Vulkan API tests with known specialization constants:
     • graphics path and compute path minimum
     • positive test: output changes when constants change
     • negative test: unknown name / wrong size
   • Reuse existing test infrastructure patterns from inline-constants and Vulkan-specific test suites.