check_uptime.js gets a fetchWithRetry wrapper (3 attempts, 2s backoff) for transient failures against the status page/heartbeat API. check_uptime_to_obsidian.js is a variant that logs results into the Obsidian vault instead of stdout. Also adds two benchmark writeups (gpt-oss-20b on Ollama, 73-node Ollama fleet). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>