- The customer address often doubles as the admin notification target, so
matching emails purely by recipient swept in system alerts (backup_failed,
restore_failed, …). The recipient match is now restricted to CRM document
types (quote_/contract_/invoice_/storno_); event-scoped mails still match
by event_id.
- getEmailPreview now falls back to renderQueuedEmail() — re-rendering from
the current template + the row's stored email_data — for emails sent before
rendered_html capture, flagged exact:false with an amber 're-rendered' note.
Only a missing template / no variables falls through to 'nothing stored'.
Known limitation: a customer with multiple projects sees their event_id=null
CRM mails under each (email_queue has no project_id).