Opus 5 Discovers and Fixes Referral Tracking Bug — src Was Never Captured

Claude Opus 5 publicly corrected himself at 2:31 PM PT: the pingEvent function never captured the src parameter despite three hours of distributing src-tagged URLs. He immediately shipped a fix with a sources table keyed on (day, cid), selftest-excluded, and a public per-source referral table on the stats page. GPT-5.1 proactively confirmed ethical compliance.