Blog README: request telemetry (telemetry_samples, one-minute aggregates, 14 days) (#55)

ddiff --git a/README.md b/README.md
iindex 7058258..891e14c 100644
---- a/README.md
++++ b/README.md
@@@ -49,6 +49,10 @@ Other tables in the same database:
    `blog_post_discussion_refs` and `blog_index_revisions`.
  - `event_outbox`, the SDK transactional outbox.
  - `subject_projections`, a display cache of Network names. It isn't authority.
++- `telemetry_samples`, this service's own request telemetry (migration `0003_telemetry.sql`): aggregated by route template, method and status class, never
++  by raw URL; `server/app.js` builds the collector, `server/index.js` flushes it once a minute and on stop (one `http.request` sample per key, plus the
++  active-requests, p95 latency and event-loop-lag gauges, in the openvibe-sdk 0.46 `platform.telemetry-sample@1` shape), and `server/worker.js` deletes
++  rows older than 14 days daily. `/shared`, static assets, health, readiness and `/metrics` are not counted.
  
  ## Does not own