ci: restore PR release tag validation step (#150)

Author: rogermiretin2

.github/workflows/release.yml

@@ -38,20 +38,19 @@ jobs:
         if: github.event_name == 'pull_request'
         run: echo "SNAPSHOT_SUFFIX=-pr-${{ github.event.number }}" >> $GITHUB_ENV
 
-      # todo: this is temporary, should be restored
-      # - name: Check for existing release tag (only on PR)
-      #   if: github.event_name == 'pull_request'
-      #   env:
-      #     VERSION: ${{ env.VERSION }}
-      #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      #   run: |
-      #     TAG_EXISTS=$(curl -H "Authorization: token $GITHUB_TOKEN" -s https://api.github.com/repos/${{ github.repository }}/releases | jq -r ".[] | select(.tag_name == \"v$VERSION\") | .tag_name")
-      #     if [ "$TAG_EXISTS" == "v$VERSION" ]; then
-      #       echo "Release tag v$VERSION already exists. Rejecting PR."
-      #       exit 1
-      #     else
-      #       echo "No existing release with tag v$VERSION found. Proceeding with build."
-      #     fi
+      - name: Check for existing release tag (only on PR)
+        if: github.event_name == 'pull_request'
+        env:
+          VERSION: ${{ env.VERSION }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TAG_EXISTS=$(curl -H "Authorization: token $GITHUB_TOKEN" -s https://api.github.com/repos/${{ github.repository }}/releases | jq -r ".[] | select(.tag_name == \"v$VERSION\") | .tag_name")
+          if [ "$TAG_EXISTS" == "v$VERSION" ]; then
+            echo "Release tag v$VERSION already exists. Rejecting PR."
+            exit 1
+          else
+            echo "No existing release with tag v$VERSION found. Proceeding with build."
+          fi
 
       # Logins
       - name: Login to Docker Hub