By default, a watch times out after 30 minutes. For debugging purposes,
it's convenient if this can be decreased. Add an environment variable
CATTLE_WATCH_TIMEOUT_SECONDS to enable setting the timeout in seconds.
Add debug logs and send websocket messages when the watch is closed
unexpectedly.
In addition to being helpful for debugging, the dashboard specifically
looks for a `resource.error` event containing the string "too old" in
order to trigger the watch to be resynced with a refreshed revision
number. Without this error returned, the dashboard will only see
`resource.stop` events and never change its behavior, continuing to try
to restart the watch with an incorrect resource version.
