Publish schema to apollo studio

.github/workflows/schema.yml

@@ -0,0 +1,55 @@
+name: Schema
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  generate_publish:
+    # Deduplicate jobs from pull requests and branch pushes within the same repo.
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.repository
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/[email protected]
+
+      - name: Install stable toolchain
+        uses: actions-rs/[email protected]
+        with:
+          toolchain: stable
+          default: true
+
+      - name: Cache Rust Build
+        uses: Swatinem/[email protected]
+
+      - name: Generate Schema
+        uses: actions-rs/[email protected]
+        with:
+          command: run
+          args: >
+            schema
+            --path sessions.graphql
+
+      - name: Upload Schema Artifact
+        uses: actions/[email protected]
+        with:
+          name: sessions.graphql
+          path: sessions.graphql
+
+      - name: Check subgraph schema
+        uses: danielsinclair/[email protected]
+        with:
+          args: |
+            subgraph check data-gateway@current
+            --schema sessions.graphql
+            --name sessions
+
+      - name: Publish subgraph schema to Apollo Studio
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') }}
+        uses: danielsinclair/[email protected]
+        with:
+          args: |
+            subgraph publish data-gateway@current 
+            --routing-url http://sessions:80 
+            --schema sessions.graphql
+            --name sessions