Closes#33. The MITM proxy only sees the agent's own actions, so
anything behind a human gate (signup captcha, email OTP, 2FA, SSO)
left the authenticated surface dark. The operator's browser becomes a
capture source instead:
- traffic: exported RecordExternal storing an externally captured
exchange through the same spill/blob/FTS path as proxy traffic
(insert logic shared with record()); rejects unparsable URLs and
empty methods
- server: POST /api/traffic/ingest inside the authenticated API group,
batch capped at 50 entries, bodies truncated at 256 KiB, per-entry
ingested/failed counts
- extension/: Manifest V3 Chrome/Edge extension driving the
chrome.debugger Network domain on the chosen tab, batching text
exchanges to the ingest endpoint with the operator's URL + JWT in
chrome.storage.local; binary bodies skipped; flush on batch/stop
- tests for both layers, README section
