ci: Add scheduled workflow to sync efcpt-config.schema.json from upstream (#62)

Author: Copilot

.github/workflows/update-schema.yml

@@ -0,0 +1,77 @@
+name: Update EFCPT Schema
+
+on:
+  schedule:
+    # Run twice daily at 6:00 AM and 6:00 PM UTC
+    - cron: '0 6,18 * * *'
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: 'Reason for manual run'
+        required: false
+        default: 'Manual schema update check'
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: "update-schema-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  check-and-update-schema:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Download upstream schema
+        id: download
+        run: |
+          UPSTREAM_URL="https://raw.githubusercontent.com/ErikEJ/EFCorePowerTools/master/samples/efcpt-config.schema.json"
+          LOCAL_PATH="lib/efcpt-config.schema.json"
+          
+          # Download the upstream schema to a temporary file
+          if ! curl -f -s -o /tmp/upstream-schema.json "$UPSTREAM_URL"; then
+            echo "Error: Failed to download upstream schema from $UPSTREAM_URL" >&2
+            exit 1
+          fi
+          
+          # If the local schema file does not exist, treat this as a change and create it
+          if [ ! -f "$LOCAL_PATH" ]; then
+            echo "Local schema file '$LOCAL_PATH' not found. Creating it from upstream."
+            mkdir -p "$(dirname "$LOCAL_PATH")"
+            cp /tmp/upstream-schema.json "$LOCAL_PATH"
+            echo "has_changes=true" >> "$GITHUB_OUTPUT"
+            echo "Changes detected in schema file (local file was missing)"
+          # Compare the files when the local schema exists
+          elif diff -q "$LOCAL_PATH" /tmp/upstream-schema.json; then
+            echo "has_changes=false" >> "$GITHUB_OUTPUT"
+            echo "No changes detected in schema file"
+          else
+            echo "has_changes=true" >> "$GITHUB_OUTPUT"
+            echo "Changes detected in schema file"
+            cp /tmp/upstream-schema.json "$LOCAL_PATH"
+          fi
+
+      - name: Create Pull Request
+        if: steps.download.outputs.has_changes == 'true'
+        uses: peter-evans/create-pull-request@v8
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: 'chore: update efcpt-config.schema.json from upstream'
+          title: 'chore: Update EFCPT Schema from Upstream'
+          body: |
+            This PR updates the `/lib/efcpt-config.schema.json` file to match the upstream version from the EFCorePowerTools repository.
+            
+            **Source**: https://raw.githubusercontent.com/ErikEJ/EFCorePowerTools/master/samples/efcpt-config.schema.json
+            
+            This PR was automatically created by the scheduled workflow.
+          branch: automated/update-efcpt-schema
+          delete-branch: true
+          labels: |
+            dependencies
+            automated