fix(api): hide campaign operational internals

tests/test_campaign_reports.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from datetime import UTC, datetime
 from types import SimpleNamespace
+import unittest
 
 from govoplan_campaign.backend.reports.campaigns import _job_evidence_row, _latest_by_job_id
 
@@ -89,6 +90,8 @@ def test_job_evidence_row_contains_transport_and_message_evidence() -> None:
     assert row["latest_smtp_response"] == "2.0.0 queued"
     assert row["latest_imap_status"] == "appended"
     assert row["latest_imap_folder"] == "Sent"
+    assert "eml_storage_key" not in row
+    assert "eml_local_path" not in row
 
 
 def test_latest_by_job_id_keeps_highest_attempt_number() -> None:
@@ -102,3 +105,15 @@ def test_latest_by_job_id_keeps_highest_attempt_number() -> None:
 
     assert latest["job-1"].attempt_number == 3
     assert latest["job-2"].attempt_number == 2
+
+
+class CampaignReportProjectionTests(unittest.TestCase):
+    def test_evidence_projection(self) -> None:
+        test_job_evidence_row_contains_transport_and_message_evidence()
+
+    def test_latest_attempt_projection(self) -> None:
+        test_latest_by_job_id_keeps_highest_attempt_number()
+
+
+if __name__ == "__main__":
+    unittest.main()