new-broadcast-event

name	new-broadcast-event
description	Add a new broadcast notification type to the ISM real-time system. Use when introducing a new SSE/WebSocket event variant that needs to be sent to connected clients.
disable-model-invocation	true
argument-hint	<EventName>
allowed-tools	Read Edit Bash(cargo check)

Add a new broadcast notification type to the ISM real-time system.

Event name: $ARGUMENTS

Your Task

First read:

• src/broadcast/notification.rs — existing NotificationEvent variants
• src/broadcast/mod.rs — BroadcastChannel API

Then implement:

1. Define the new event (src/broadcast/notification.rs)

• Add a new variant to the NotificationEvent enum
• Define the corresponding payload type as a struct (with serde::Serialize)

2. Broadcast call in the service

• Show where in the service the broadcast call belongs
• Use the pattern from BroadcastChannel::get() — either send_event or send_event_to_all
• Always broadcast after a successful DB write, never before

3. Final check

• Run cargo check
• Ensure all match arms on NotificationEvent are updated