Release govoplan-campaign v0.1.28: stabilize saving, review and delivery recovery

src/govoplan_campaign/backend/route_support.py

@@ -12,6 +12,8 @@ from sqlalchemy.orm import Session
 from govoplan_campaign.backend.campaign.mail_profile_boundary import (
     CAMPAIGN_MAIL_SERVER_KEYS,
     campaign_mail_profile_id,
+    campaign_mail_references_unchanged,
+    campaign_preserves_legacy_mail_settings,
 )
 from govoplan_campaign.backend.archive_encryption import (
     CampaignArchiveEncryptionError,
@@ -458,7 +460,18 @@ def _update_campaign_version_detail_response(
             ),
             detail=str(exc),
         ) from exc
-    _require_mail_profile_use_if_needed(principal, payload.campaign_json)
+    preserves_legacy_mail = (
+        not payload.migrate_legacy_mail_settings
+        and campaign_preserves_legacy_mail_settings(
+            current_version.raw_json, payload.campaign_json
+        )
+    )
+    unchanged_mail_selection = (
+        not payload.migrate_legacy_mail_settings
+        and campaign_mail_references_unchanged(current_version.raw_json, payload.campaign_json)
+    )
+    if not unchanged_mail_selection:
+        _require_mail_profile_use_if_needed(principal, payload.campaign_json)
     try:
         result = _campaign_version_detail_response(
             session,
@@ -499,6 +512,7 @@ def _update_campaign_version_detail_response(
                     }
                 ),
                 "legacy_mail_settings_migrated": payload.migrate_legacy_mail_settings,
+                "legacy_mail_settings_preserved": preserves_legacy_mail,
                 "legacy_zipcrypto_acknowledgements": acknowledgements,
             },
             validation_error_status=status.HTTP_422_UNPROCESSABLE_CONTENT,