updated readme files to reflect earlier changes in last commit

QUICKSTART.md

@@ -16,6 +16,8 @@ Wait until you see "Application startup complete", then press Ctrl+C.
 - API: http://localhost:8050/api/v1
 - Docs: http://localhost:8050/docs
 
+API datetimes are stored and returned in UTC/Zulu. The frontend shows member-facing times in Europe/London and converts event input back to UTC before saving.
+
 Set `APP_PORT` in `.env` / `.env.example` to change `8050`.
 For Square payment form testing, use HTTPS at `https://localhost:8443`.
 Set `APP_TLS_PORT` in `.env` / `.env.example` to change `8443`.
@@ -137,6 +139,12 @@ docker compose logs -f gateway
 2. Members can view upcoming events and submit RSVP status
 3. Admins can view RSVP lists and attendance data
 
+### ESP RFID readers
+1. Readers register with `/api/v1/esp/device/register`
+2. Readers sync clocks from `/api/v1/esp/device/time`
+3. Tap, heartbeat, and write-job timestamps are UTC-normalized in the backend
+4. Admins can review readers, taps, attendance, and card-write jobs from the ESP screens
+
 ### Manage email templates and bounces
 1. Super admins can edit database-backed email templates; previews are shown as escaped HTML text
 2. SMTP2GO bounce webhooks are stored and visible in bounce management