News README: request telemetry (telemetry_samples, one-minute aggregates, 14 days) (#66)

ddiff --git a/README.md b/README.md
iindex 62ab7b3..ec13bc8 100644
---- a/README.md
++++ b/README.md
@@@ -55,6 +55,13 @@ Other tables in the same database:
    keeps the pre-chassis key it was carried from), `news_source_status` (display cache of Sources'
    registry names and health), `event_outbox` and `idempotency_receipts` (openvibe-sdk),
    `subject_projections` (Network names). None of them is authority for anything outside News.
++- `telemetry_samples` (migration `0003_telemetry.sql`): News' own request telemetry, openvibe-sdk
++  0.46's `platform.telemetry-sample@1` shape. Each HTTP request is aggregated by route template,
++  method and status class, never by raw URL; `/shared` files, static assets, health, readiness and
++  `/metrics` are not counted. Once a minute one `http.request` sample per key, plus the
++  active-requests, p95 latency and event-loop-lag gauges, is written here (`server/app.js` builds
++  the collector, `server/index.js` flushes it and runs the 14-day retention); rows older than
++  14 days are deleted daily.
  
  ## Does not own