feat(notify): 钉钉月报卡片底部添加查看详情链接

在 markdown 卡片末尾追加 [查看详情](details_url) 链接，
与企业微信、飞书通知保持一致，方便用户跳转到网站下载 Excel 报表。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: freemankevin

app/notifiers/dingtalk.py

@@ -95,7 +95,8 @@ def _fmt_version(val):
             soft_truncated=soft_truncated,
             sep="\n---\n",
         )
-        full_text = f"{head_block}\n---\n{body}".rstrip()
+        footer = f"\n\n[查看详情]({report.details_url})"
+        full_text = f"{head_block}\n---\n{body}{footer}".rstrip()
 
         return {
             "msgtype": "markdown",