debug(project_events): log every publish call with uid set

Temporary instrumentation to debug why SSE board events aren't reaching
the browser. Will revert once root cause is identified.

services/project_events/events.go

@@ -250,6 +250,7 @@ func publishEvent(ctx context.Context, projectID int64, payload any) {
 		Data: data,
 	}
 	uids := connectedUIDsWithProjectAccess(ctx, projectID)
+	log.Info("project_events: publish project=%d event=%s uids=%v connected=%v", projectID, event.Name, uids, eventsource.GetManager().ConnectedUIDs())
 	if len(uids) == 0 {
 		return
 	}