_trigger_sync reads jira config from self.ctx.config.data, but if the
user hasn't clicked Save yet the config still holds old/empty values.
Add self._save() at the top of _trigger_sync so the current form
values (base URL, email, token, project mapping) are persisted to
config before the background sync job reads them.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
