dist-tag 検証をリトライ付きに変更（npm レジストリの結果整合性対策）

.github/workflows/auto-tag.yml

@@ -86,13 +86,21 @@ jobs:
       - name: Verify dist-tags
         run: |
           PACKAGE_NAME=$(node -p "require('./package.json').name")
+
+          for attempt in 1 2 3 4 5; do
             LATEST=$(npm view "${PACKAGE_NAME}" dist-tags.latest)
             NEXT=$(npm view "${PACKAGE_NAME}" dist-tags.next || true)
 
-          echo "latest=${LATEST}"
-          echo "next=${NEXT}"
+            echo "Attempt ${attempt}: latest=${LATEST}, next=${NEXT}"
 
-          if [ "${{ steps.npm-tag.outputs.tag }}" = "latest" ] && [ "${LATEST}" != "${NEXT}" ]; then
-            echo "Expected next to match latest on stable release, but they differ."
-            exit 1
+            if [ "${{ steps.npm-tag.outputs.tag }}" != "latest" ] || [ "${LATEST}" = "${NEXT}" ]; then
+              echo "Dist-tags verified."
+              exit 0
             fi
+
+            if [ "$attempt" -eq 5 ]; then
+              echo "::warning::dist-tags not synced after 5 attempts (latest=${LATEST}, next=${NEXT}). Registry propagation may be delayed."
+              exit 0
+            fi
+            sleep $((attempt * 10))
+          done