chore: update fullsend shim workflow

.github/workflows/fullsend.yaml

@@ -28,7 +28,7 @@ permissions:
 
 on:
   issues:
-    types: [labeled]
+    types: [labeled, opened]
   issue_comment:
     types: [created]
   pull_request_target:
@@ -399,6 +399,43 @@ jobs:
             -f source_repo="$SOURCE_REPO" \
             -f event_payload="$EVENT_PAYLOAD"
 
+  dispatch-gh-classify:
+    runs-on: ubuntu-latest
+    if: >-
+      github.event_name == 'issues' && github.event.action == 'opened'
+    steps:
+      - name: Build minimal payload
+        id: payload
+        env:
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+          ISSUE_HTML_URL: ${{ github.event.issue.html_url }}
+          ISSUE_AUTHOR: ${{ github.event.issue.user.login }}
+        run: |
+          set -euo pipefail
+          PAYLOAD=$(jq -cn \
+            --arg in "${ISSUE_NUMBER:-}" \
+            --arg iu "${ISSUE_HTML_URL:-}" \
+            --arg au "${ISSUE_AUTHOR:-}" \
+            --arg repo "${{ github.repository }}" \
+            '{issue: {number: (if $in != "" then ($in | tonumber) else null end), html_url: (if $iu != "" then $iu else null end), author: $au}, repository: $repo}')
+          echo "json=$PAYLOAD" >> "$GITHUB_OUTPUT"
+      - name: Dispatch gh-classify
+        env:
+          GH_TOKEN: ${{ secrets.FULLSEND_DISPATCH_TOKEN }}
+          EVENT_PAYLOAD: ${{ steps.payload.outputs.json }}
+          EVENT_TYPE: issues
+          SOURCE_REPO: ${{ github.repository }}
+          DISPATCH_REPO: ${{ github.repository_owner }}/.fullsend
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+        run: |
+          gh workflow run gh-classify.yml \
+            --repo "$DISPATCH_REPO" \
+            --field event_type="$EVENT_TYPE" \
+            --field source_repo="$SOURCE_REPO" \
+            --field event_payload="$EVENT_PAYLOAD" \
+            --field classify_mode="single" \
+            --field issue_number="$ISSUE_NUMBER"
+
   dispatch-stop-fix:
     runs-on: ubuntu-latest
     if: >-