add a changelog entry check for pull requests

.github/workflows/changelog-entry-check.yml

@@ -0,0 +1,29 @@
+name: Changelog entry check
+
+on:
+    pull_request:
+      types:
+      -   opened
+      -   reopened
+      -   labeled
+      -   unlabeled
+      -   synchronize
+
+defaults:
+    run:
+        shell: bash
+
+permissions:
+    contents: read
+    pull-requests: write
+
+jobs:
+    changelog-entry-check:
+        uses: dbt-labs/actions/.github/workflows/changelog-existence.yml@main
+        with:
+            changelog_comment: |
+                "Thank you for your pull request!"
+                "We could not find a changelog entry for this change."
+                "For details on how to document a change, see the [dbt-postgres contributing guide](https://github.com/dbt-labs/dbt-postgres/blob/main/CONTRIBUTING.md)."
+            skip_label: "Skip Changelog"
+        secrets: inherit