fix(campaign): sanitize synchronous send results

src/govoplan_campaign/backend/router.py

@@ -117,6 +117,8 @@ from govoplan_campaign.backend.reports.aggregate import (
 from govoplan_campaign.backend.response_security import (
     public_campaign_payload,
     public_delivery_result_message,
+    public_send_campaign_now_result,
+    send_campaign_now_audit_details,
 )
 from govoplan_campaign.backend.reports.emailing import CampaignReportEmailError, send_campaign_report_email
 from govoplan_campaign.backend.persistence.campaigns import (
@@ -3580,7 +3582,7 @@ def send_campaign_now_endpoint(
                 detail="Campaign version must be built before dry-run or sending.",
             )
 
-        result = send_campaign_now(
+        delivery_result = send_campaign_now(
             session,
             tenant_id=principal.tenant_id,
             campaign_id=campaign_id,
@@ -3590,18 +3592,21 @@ def send_campaign_now_endpoint(
             use_rate_limit=payload.use_rate_limit,
             enqueue_imap_task=payload.enqueue_imap_task,
         ).as_dict()
-        result["validation"] = validation_result
-        result["build"] = build_result
+        response_result = public_send_campaign_now_result(
+            delivery_result,
+            validation_summary=validation_result,
+            build_summary=build_result,
+        )
         audit_from_principal(
             session,
             principal,
             action="campaign.sent_now" if not payload.dry_run else "campaign.send_now_dry_run",
             object_type="campaign",
             object_id=campaign_id,
-            details=result,
+            details=send_campaign_now_audit_details(delivery_result),
             commit=True,
         )
-        return SendCampaignNowResponse(result=result)
+        return SendCampaignNowResponse(result=response_result)
     except SynchronousSendRejected as exc:
         audit_from_principal(
             session,