feat(notify): Web Push subscriptions and email/push prefs.

Prefs in user.preferences; push_subscription table; VAPID send on
reminder/waitlist. Refs EventHub/EventHubBack#75

docker/.env.example

@@ -26,6 +26,10 @@ EMAIL_TRANSPORT=auto
 EMAIL_API_KEY=
 EMAIL_API_PROVIDER=resend
 # EMAIL_API_URL=https://api.resend.com/emails
+# Web Push (VAPID). Generate: npx web-push generate-vapid-keys
+VAPID_PUBLIC_KEY=
+VAPID_PRIVATE_KEY=
+VAPID_SUBJECT=mailto:admin@calentiq.com
 # SMTP (пусто SMTP_HOST + нет API key = только лог; пароль не коммитить)
 SMTP_HOST=
 SMTP_PORT=587

docker/docker-compose.stage.yml

@@ -45,6 +45,9 @@ services:
       - EMAIL_API_KEY=${EMAIL_API_KEY:-}
       - EMAIL_API_PROVIDER=${EMAIL_API_PROVIDER:-resend}
       - EMAIL_API_URL=${EMAIL_API_URL:-}
+      - VAPID_PUBLIC_KEY=${VAPID_PUBLIC_KEY:-}
+      - VAPID_PRIVATE_KEY=${VAPID_PRIVATE_KEY:-}
+      - VAPID_SUBJECT=${VAPID_SUBJECT:-mailto:admin@calentiq.com}
       - SMTP_HOST=${SMTP_HOST:-}
       - SMTP_PORT=${SMTP_PORT:-587}
       - SMTP_USER=${SMTP_USER:-}