chore: Add release author to SDK notification payload (#865)

Author: tamaralipows

.github/workflows/notify-sdk.yaml

@@ -9,14 +9,45 @@ jobs:
     name: Trigger SDK update workflow
     runs-on: ubuntu-latest
     steps:
+      - name: Find PR merger
+        id: release_author
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TAG="${{ github.event.release.tag_name }}"
+          REPO="${{ github.repository }}"
+
+          # Get the object the tag points to
+          REF_INFO=$(gh api "repos/$REPO/git/ref/tags/$TAG" --jq '.object | "\(.sha) \(.type)"')
+          TAG_SHA=$(echo "$REF_INFO" | cut -d' ' -f1)
+          TAG_TYPE=$(echo "$REF_INFO" | cut -d' ' -f2)
+
+          # Dereference annotated tag to get commit SHA
+          if [ "$TAG_TYPE" = "tag" ]; then
+            COMMIT_SHA=$(gh api "repos/$REPO/git/tags/$TAG_SHA" --jq '.object.sha')
+          else
+            COMMIT_SHA="$TAG_SHA"
+          fi
+
+          # Get parent of the release commit (skip chore(release) by bot)
+          PARENT_SHA=$(gh api "repos/$REPO/commits/$COMMIT_SHA" --jq '.parents[0].sha // empty')
+
+          AUTHOR=""
+          if [ -n "$PARENT_SHA" ]; then
+            AUTHOR=$(gh api "repos/$REPO/commits/$PARENT_SHA/pulls" --jq '.[0].user.login // empty' 2>/dev/null || echo "")
+          fi
+
+          echo "author=$AUTHOR" >> $GITHUB_OUTPUT
+          echo "Release author: ${AUTHOR:-unknown}"
+
       - name: Trigger tycho-protocol-sdk update workflow
         run: |
           curl -X POST \
             -H "Accept: application/vnd.github.v3+json" \
             -H "Authorization: token ${{ secrets.SDK_REPO_DISPATCH_TOKEN }}" \
             https://api.github.com/repos/propeller-heads/tycho-protocol-sdk/dispatches \
-            -d '{"event_type":"tycho-indexer-release","client_payload":{"version":"${{ github.event.release.tag_name }}"}}'
+            -d '{"event_type":"tycho-indexer-release","client_payload":{"version":"${{ github.event.release.tag_name }}","release_author":"${{ steps.release_author.outputs.author }}"}}'
 
       - name: Log notification
         run: |
-          echo "Notified tycho-protocol-sdk of release ${{ github.event.release.tag_name }}"
+          echo "Notified tycho-protocol-sdk of release ${{ github.event.release.tag_name }} by ${{ steps.release_author.outputs.author }}"