feat(ci): add cross-platform testing workflow

Signed-off-by: Catarina Paralta <clouropa@cisco.com>

Author: paralta

.github/workflows/ci.yaml

@@ -196,6 +196,14 @@ jobs:
       image_repo: ghcr.io/agntcy
       image_tag: ${{ github.sha }}
 
+  cross-platform:
+    name: Cross-Platform Test
+    needs:
+      - lint
+      - license
+      - verify
+    uses: ./.github/workflows/reusable-test-e2e-cross-platform.yaml
+
   upload-codecov:
     name: Upload all coverage artifacts to Codecov
     needs: [test]
@@ -276,6 +284,7 @@ jobs:
       - test
       - upload-codecov
       - release
+      - cross-platform
     runs-on: ubuntu-latest
     steps:
       - name: Echo Success

.github/workflows/reusable-test-e2e-cross-platform.yaml

@@ -0,0 +1,62 @@
+# Copyright AGNTCY Contributors (https://github.com/agntcy)
+# SPDX-License-Identifier: Apache-2.0
+
+name: Test E2E Cross-Platform
+
+on:
+  workflow_call:
+
+jobs:
+  cross-platform:
+    name: Cross-Platform Test ${{ matrix.label }}
+    runs-on: ${{ matrix.runner }}
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - runner: ubuntu-latest
+            label: Linux
+          - runner: macos-latest
+            label: macOS
+          - runner: windows-latest
+            label: Windows
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0
+
+      - name: Install Task
+        uses: go-task/setup-task@3be4020d41929789a01026e0e427a4321ce0ad44 #v2.0.0
+
+      - name: Setup Cosign
+        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
+
+      - name: Setup Go
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
+        with:
+          go-version: "1.26.1"
+          cache-dependency-path: "**/*.sum"
+          cache: true
+
+      - name: Compile CLI
+        run: task cli:compile
+
+      - name: Run daemon smoke tests (default backend)
+        env:
+          DIRECTORY_CLIENT_SERVER_ADDRESS: localhost:8888
+        run: |
+          if [[ "$RUNNER_OS" == "Windows" ]]; then
+            DIRCTL_BIN=".bin/dirctl.exe"
+          else
+            DIRCTL_BIN=".bin/dirctl"
+          fi
+
+          DATA_DIR=$(mktemp -d)
+
+          "$DIRCTL_BIN" daemon start --data-dir "$DATA_DIR" &
+
+          go test -C ./tests/e2e/daemon . -v -failfast -test.v -test.paniconexit0 -ginkgo.timeout 5m -timeout 5m -ginkgo.v