Blog LLM client probes BLOG_OLLAMA_URL (primary, WireGuard tunnel to Mac
Studio loopback Ollama) and falls back to BLOG_OLLAMA_URL_FALLBACK
(Cloudflare tunnel) when the primary transport is unreachable. Re-probed
at startup and every 60s; prefers primary when available. Both tunnels
terminate on the Mac loopback over independent transports, so the blog
keeps reaching fo-blog regardless of which transport drops.
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