Avoid sending an "empty" (lacking project data) startup event.

[rgrunber]

• When the language server import takes too long (>60s), an "empty" startup event is sent to at least capture some data. This can result in duplicate events when a project import finally completes, or a (now) useless event if something goes wrong.
• Avoid sending such events as there are better ways to determine if the language server encountered an error