Create symbol server directory and make it an artifact

.github/workflows/windows.yml

@@ -134,6 +134,10 @@ jobs:
         mkdir ${{ github.workspace }}/build/iconengines
         cp plugins/iconengines/qsvgicon.dll ${{ github.workspace }}/build/iconengines
 
+    - name: Create symbol server directory structure
+      run: |
+        .\CI\Store-Symbols.ps1
+
     - name: Move pdb files
       run: |
         robocopy build pdb *.pdb /MOVE
@@ -179,6 +183,12 @@ jobs:
         name: openmw-windows-${{ inputs.image }}-${{ github.sha }}
         path: ${{ github.workspace }}/install/*
 
+    - name: Store symbol server artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: openmw-windows-${{ inputs.image }}-sym-store-${{ github.sha }}
+        path: ${{ github.workspace }}/SymStore/*
+
     - name: Add install directory to PATH
       shell: bash
       run: echo '${{ github.workspace }}/install' >> ${GITHUB_PATH}