Improve release and benchmark tooling

.github/workflows/ci.yml

@@ -48,6 +48,33 @@ jobs:
         if: steps.nightly.outcome != 'success' || steps.install.outcome != 'success'
         run: echo "cargo-fuzz / nightly toolchain unavailable; skipped fuzz smoke run."
 
+  package-release:
+    if: github.event_name == 'workflow_dispatch' || startsWith(github.ref, 'refs/tags/')
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            name: linux-x86_64
+          - os: macos-14
+            name: macos-aarch64
+          - os: macos-13
+            name: macos-x86_64
+          - os: windows-latest
+            name: windows-x86_64
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Package release
+        shell: bash
+        run: sh scripts/package-release.sh
+      - uses: actions/upload-artifact@v4
+        with:
+          name: dosh-${{ matrix.name }}
+          path: |
+            target/dosh-release/dosh-*
+            !target/dosh-release/stage/**
+
   remote-bench:
     runs-on: ubuntu-latest
     env: