Run slice-validation sweep on engine PRs in CI

.github/workflows/build_orca.yml

@@ -508,6 +508,20 @@ jobs:
           retention-days: 5
           if-no-files-found: error
 
+        # Ship the freshly-built validator so the parallel slice_check_linux job
+        # (build_all.yml) can slice-sweep the shipped profiles with this PR's
+        # engine. Stable sha-based name mirrors the tests artifact above so the
+        # downstream job downloads it by exact name.
+      - name: Upload profile validator (for slice check)
+        if: runner.os == 'Linux' && inputs.arch != 'aarch64'
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ github.sha }}-profile-validator-linux-x86_64
+          overwrite: true
+          path: ./build/src/Release/OrcaSlicer_profile_validator
+          retention-days: 5
+          if-no-files-found: error
+
       - name: Run external slicer regression tests
         if: runner.os == 'Linux' && inputs.arch != 'aarch64'
         timeout-minutes: 20