`EntityDb` emits `WARN` due to missing `log_time` timeline

[grtlr]

Sometimes the EntityDb emits the following warning:

WARN  re_entity_db::entity_db] Timeline "log_time" not found

I strongly suspect this is a timing problem that comes from either the DataUi or the Recording panel. Both might query the EntityDb for recording name or start_time after the store is created with SetStoreInfo, but before the first data actually arrives.

[grtlr]

This might have been fixed by:

• Implement basic UI to display recording properties #9381

At least I haven't seen the warning since.