Merge PR #48: feat: add Xiaohongshu source + Reddit public fallback

- Xiaohongshu search via local MCP service (opt-in, zero impact if service not running)
- Reddit public JSON fallback (works with zero API keys)
- Reddit priority: ScrapeCreators -> OpenAI -> public fallback
- Updated env.py: Reddit always available via public fallback

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/test-results/v1-vs-v2-quick/v2/1-kanye-west.txt

@@ -0,0 +1,25 @@
+Here's what I found:
+
+## What I learned:
+
+**BULLY Album — March 20, 2026 via Gamma** — After years of delays (first announced September 2024), Kanye's 12th studio album finally has a firm release date. The 13-track project features Peso Pluma, Playboi Carti, and Ty Dolla Sign. Sonically it recalls *808s & Heartbreak* and *MBDTF* — Ye mostly sings rather than raps. Notably, earlier leak versions used AI-deepfaked vocals, which have reportedly been re-recorded with his real voice for the official release, per Rolling Stone.
+
+**Public Apology for Antisemitism** — On January 26, Ye took out a full-page Wall Street Journal ad titled "To Those I've Hurt," publicly apologizing for his antisemitic remarks. He disclosed a previously undiagnosed brain injury from his 2002 car accident and attributed his behavior to a four-month manic episode fueled by bipolar disorder, psychosis, and paranoia. "I lost touch with reality," he wrote. The apology also extended to the Black community, per The Washington Post.
+
+**Hellwatt Festival in Italy** — Ye is headlining a brand-new festival at the 103,000-capacity RCF Arena in Italy over three weekends from July 4-18, 2026 — his first-ever live concert in Italy, per Billboard.
+
+**Health Concerns** — A rare January 2026 outing in LA with Bianca Censori reignited concern about Ye's physical appearance. Insiders point to medication side effects, frequent travel, and inconsistent routines, per AllHipHop.
+
+**Grammys Ban** — Ye is reportedly not welcome at the 2026 Grammy Awards after clashing with organizers last year over his invitation terms, per The News International.
+
+**Kim & Lewis Hamilton Buzz** — X chatter is heavily focused on Kim Kardashian's relationship with Lewis Hamilton, with users contrasting her new relationship against her marriage to Ye.
+
+---
+✅ All agents reported back!
+├─ 🟠 Reddit: 0 threads (no results this cycle)
+├─ 🔵 X: 29 posts │ 33 likes │ 14 reposts (via xAI)
+├─ 🌐 Web: 30+ pages │ rollingstone.com, washingtonpost.com, complex.com, billboard.com, npr.org
+└─ 🗣️ Top voices: @honest30bgfan_ (33 likes), @HipHopCrave_ │ Rolling Stone, Washington Post, Complex
+---
+
+Share your vision for what you want to create and I'll write a thoughtful prompt you can copy-paste directly into your tool of choice.