docs(polymarket): add hotspots briefing for 2026-05-26

[leno23]

Report

• 日期：2026-05-26（北京时间）
• 文件：reports/polymarket-hotspots/2026-05-26.md
• 数据来源：Polymarket Gamma public API（预运行脚本 polymarket_hotspots_collect.py 输出）
• 自动任务：由 Hermes 定时任务自动生成

Summary

• Adds the daily Chinese Polymarket hotspots briefing for 2026-05-26.
• Highlights 24h volume leaders across events and markets.
• Covers key themes: 2026 World Cup outrights, Iran-related geopolitics, Bitcoin threshold markets, Fed decision, sports, long-horizon US politics, and WTI crude.
• Includes data status, collection caveats, risk notes, and non-investment-advice disclaimer.

Validation

• Verified report file is non-empty.
• Verified title/date/data source/disclaimer are present.
• Verified no credential-like strings are present in the report content.

由 Hermes daily-polymarket-hotspots cron 自动生成。