Add NotificationCreatedEvent that fires automatically when a
DatabaseNotification is inserted, using XORM's AfterInsertProcessor
interface. The AfterInsert hook dispatches the event after the row
is persisted, without callers needing to manage DispatchOnCommit or
DispatchPending.
The WebSocket listener subscribes to this event, reloads the
notification from the database (ensuring accurate timestamps), and
pushes it to connected clients subscribed to the notification.created
event. Dispatch errors are logged rather than propagated since the
DB notification is already committed at that point.
Add the WebSocket upgrade endpoint at /api/v1/ws with CORS origin
verification using the configured allowed origins. Includes nil hub
guard returning 503 if the WebSocket system hasn't been initialized.
Register the hub initialization in the app startup sequence and wire
the upgrade handler into the Echo router.
Add the core WebSocket infrastructure:
- Message type definitions for the wire protocol (subscribe, unsubscribe,
auth, error, push events)
- In-memory connection hub that tracks per-user connections and routes
messages to subscribed clients
- Connection wrapper with auth-after-connect flow: connections start
unauthenticated, client sends JWT as first message, only then can
subscribe to event topics
Includes auth timeout (30s), shared cancellation context for read/write
loops, hub map cleanup on last connection removal, and proper error
delivery before closing on auth failure.
