ci: add license verification workflow (#22)

Signed-off-by: Davanum Srinivas <dsrinivas@nvidia.com>

Author: dims

.github/workflows/verify-licenses.yaml

@@ -0,0 +1,67 @@
+# Copyright (c) 2025, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Verify Licenses
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'go.mod'
+      - 'go.sum'
+  pull_request:
+    branches: [main]
+    paths:
+      - 'go.mod'
+      - 'go.sum'
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  verify-licenses:
+    name: Verify CNCF-Approved Licenses
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Setup Go
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        with:
+          go-version-file: go.mod
+          cache: true
+
+      - name: Install go-licenses
+        run: go install github.com/google/go-licenses@latest
+
+      - name: Report licenses
+        run: |
+          echo "=== Dependency Licenses ==="
+          go-licenses report ./... 2>/dev/null | sort -t',' -k3 | column -t -s','
+          echo ""
+          echo "=== License Summary ==="
+          go-licenses report ./... 2>/dev/null | cut -d',' -f3 | sort | uniq -c | sort -rn
+
+      - name: Check licenses
+        run: |
+          # Allowed licenses (all CNCF-approved)
+          go-licenses check ./... \
+            --allowed_licenses=Apache-2.0,BSD-2-Clause,BSD-3-Clause,ISC,MIT