Investigate a topic with Grok 4.1 via OpenRouter and generate a Markdown report with a timeline, verifiable claims, and sources (web/X). Use it when the user says “investiga…”, “haz research…”, “averigua…”, “búscame fuentes…”, “research…”, “look into…”, or when you need fast, source-backed research (news, rumors, product/policy changes, competitive context).