GET /feed — JSON, newest firstGET /feed.ndjson — newline-delimited JSONGET /feed.rss — Atom 1.0GET /health — counts by source?since=<unix_ms> — items newer than (asc by default)?until=<unix_ms> — items older than?source=email: — prefix match (trailing colon = wildcard)?limit=<n> — default 500, max 5000?order=asc|desc