adding job to ensure opentelemetry version

.github/workflows/ensure-opentelemetry-version.yaml

@@ -0,0 +1,30 @@
+name: Ensure singular opentelemetry version
+
+on:
+  pull_request:
+    branches:
+      - "main"
+    paths:
+      - 'Cargo.lock'
+      - '.github/workflows/ensure-opentelemetry-version.yaml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  ensure-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - name: "🔭 Ensure singular opentelemetry version"
+        shell: bash
+        run: |
+          count=$(grep -n 'name = "opentelemetry"' Cargo.lock | wc -l)
+
+          if [ "$count" -gt 1 ]; then
+              exit 1
+          fi