fix: cap NATS JetStream streams to prevent OOM crash

WIRELESS_REGISTRATIONS stream had a 256MB MaxBytes cap in a 256MB
container — guaranteed to crash under load. ALERT_EVENTS and
OPERATION_EVENTS had no byte limit at all.

- Reduce WIRELESS_REGISTRATIONS MaxBytes from 256MB to 128MB
- Add 16MB MaxBytes cap to ALERT_EVENTS and OPERATION_EVENTS
- Bump NATS container memory limit from 256MB to 384MB
- Add restart: unless-stopped to NATS in base compose
- Bump version to 9.8.2

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -70,10 +70,11 @@ services:
       interval: 5s
       timeout: 5s
       retries: 5
+    restart: unless-stopped
     deploy:
       resources:
         limits:
-          memory: 256M
+          memory: 384M
     networks:
       - tod