- EF model had a pending HasOne/WithMany relationship not in migrations - Adds FK_email_channel_usage_email_channels_provider_id with cascade delete Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
- Fix EmailEmailTemplateEntityConfiguration -> EmailTemplateEntityConfiguration - Rename tables to match domain: templates->email_templates, providers->email_channels, provider_usage->email_channel_usage - Add NotificationDbContextFactory for design-time migrations tooling - Add InitialCreate migration: email_templates, email_channels, email_channel_usage Ref: IT-628 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>