[ci] Add ASC secrets presence check for debugging auth failure

.gitea/workflows/beta.yml

@@ -20,6 +20,18 @@ jobs:
             "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/archive/${{ github.sha }}.tar.gz"
           tar -xzf /tmp/repo.tar.gz --strip-components=1 -C "$GITHUB_WORKSPACE"
 
+      - name: Check ASC secrets are present (no values printed)
+        run: |
+          for s in ASC_KEY_ID ASC_ISSUER_ID ASC_KEY_CONTENT CI_KEYCHAIN_PASSWORD; do
+            eval "v=\${${s}:-}"
+            if [ -n "$v" ]; then echo "$s: SET (${#v} chars)"; else echo "$s: EMPTY"; fi
+          done
+        env:
+          ASC_KEY_ID: ${{ secrets.ASC_KEY_ID }}
+          ASC_ISSUER_ID: ${{ secrets.ASC_ISSUER_ID }}
+          ASC_KEY_CONTENT: ${{ secrets.ASC_KEY_CONTENT }}
+          CI_KEYCHAIN_PASSWORD: ${{ secrets.CI_KEYCHAIN_PASSWORD }}
+
       - name: Write App Store Connect API key
         run: |
           cat > fastlane/apikey.json <<EOF