add daily model generation workflow

Author: nmorgan-cb

.github/workflows/daily-model-generation.yml

@@ -0,0 +1,81 @@
+name: Daily Model Generation
+
+on:
+  schedule:
+    # Run at 1 AM UTC every day
+    - cron: '0 1 * * *'
+  workflow_dispatch: # Allow manual triggering
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  generate-models:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'corretto'
+          java-version: '17'
+          architecture: x64
+
+      - name: Cache Maven dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - name: Generate models from OpenAPI spec
+        run: mvn -Pgenerate-models
+
+      - name: Check for changes
+        id: git-check
+        run: |
+          git diff --exit-code || echo "changes=true" >> $GITHUB_OUTPUT
+
+      - name: Create Pull Request
+        if: steps.git-check.outputs.changes == 'true'
+        uses: peter-evans/create-pull-request@v6
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: 'chore: update generated models from OpenAPI spec'
+          branch: automated/model-generation-${{ github.run_number }}
+          delete-branch: true
+          title: 'chore: Update generated models from OpenAPI spec'
+          body: |
+            ## Automated Model Generation
+            
+            This PR contains automatically generated updates to the SDK models based on the latest OpenAPI specification from `https://api.prime.coinbase.com/v1/openapi.yaml`.
+            
+            ### What changed?
+            - Models generated/updated via `mvn -Pgenerate-models`
+            - Changes reflect updates to the Prime API specification
+            
+            ### How to review
+            1. Verify that generated files follow SDK conventions
+            2. Check that new models have proper Builder patterns and license headers
+            3. Ensure enums are properly generated
+            4. Run tests to verify compatibility: `mvn clean install`
+            
+            ### Generated by
+            Workflow: `${{ github.workflow }}`
+            Run: `${{ github.run_id }}`
+            Triggered: `${{ github.event_name }}`
+          labels: |
+            automated
+            model-generation
+          assignees: ${{ github.repository_owner }}
+
+      - name: No changes detected
+        if: steps.git-check.outputs.changes != 'true'
+        run: echo "No model changes detected. Skipping PR creation."