Observatory bridge — SuperAce Phase 10-B B-tail.1

Endpoints:
  POST /events          (browser batches events)
  POST /probe           (Claude submits JS; returns {id})
  GET  /probe-poll      (browser polls pending)
  POST /probe-result    (browser posts exec result)
  GET  /probe-result/N  (Claude reads result)
  GET  /status          (counters)
  GET  /observatory.js  (standalone instrumentation script)
  GET  /userscript.user.js  (Tampermonkey bootstrap)

Data: /home/devuser/superace-clone/observatory/events.jsonl