getOrCreateWsChannel: recreate channel after it expires

Currently, once a WebSocket channel expires, the frontend just stops listening and no message is provided to the user.

https://github.com/assemblee-virtuelle/semapps/blob/master/src/frontend/packages/semantic-data-provider/src/notificationChannels/subscribeToUpdates.ts#L135-L140

If the tab is visible (`!document.hidden`), or when it becomes visible again (using the [visibilitychange](https://github.com/activitypods/activitypods/blob/4143beb521f0de29ae63343d67860df992cc45f9/app-framework/react/src/components/BackgroundChecks.tsx#L84-L87) event), we should probably recreate a WebSocket channel.