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Marcel PeterkauandClaude Opus 5
e87f859101
generate_and_send_welcome_mail() arrived with the mail templates, after the read-only guards were added to the other services, and never got one. On a read-only store it therefore rendered the mail, could hand it to the mail server, and only failed when it tried to create the archive directory in the member file -- surfacing a PermissionError instead of the ReadOnlyStoreError every other write path reports. The guard now sits at the top, next to the delivery-mode check, so nothing is rendered, sent or written. The read-only test covers this path (and the SEPA batch alongside it) and asserts that nothing at all was left behind: no export file, no archive directory, no "sent" event. Its member carries an e-mail address now -- without one the mail services bail out for that reason, and the write the test exists for is never reached. Note that the SEPA CSV/XML export keeps writing without a guard on purpose: it writes to a path the board picks outside the store, which a read-only store has no say over. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>