feat(campaign): govern attachment reuse

tests/test_documentation.py

@@ -78,6 +78,33 @@ def test_complete_review_workflow_documents_each_attention_class() -> None:
     assert topic.metadata["help_contexts"] == ["campaign.review-send"]
 
 
+def test_attachment_reuse_workflow_documents_policy_and_evidence() -> None:
+    topic = next(
+        item
+        for item in CAMPAIGN_USER_DOCUMENTATION
+        if item.id == "campaigns.workflow.control-attachment-reuse"
+    )
+
+    rendered = "\n".join(
+        (
+            topic.summary,
+            topic.body,
+            *topic.metadata["steps"],
+            topic.metadata["verification"],
+        )
+    )
+    assert "allow" in rendered.lower()
+    assert "warn" in rendered.lower()
+    assert "review" in rendered.lower()
+    assert "block" in rendered.lower()
+    assert "fingerprint" in rendered.lower()
+    assert "reason" in rendered.lower()
+    assert topic.metadata["help_contexts"] == [
+        "campaign.attachments",
+        "campaign.attachments.reuse-policy",
+    ]
+
+
 def test_runtime_documentation_is_user_only_and_requires_a_campaign_task() -> None:
     assert _topics({"docs:documentation:read"}) == ()
     assert _topics({"campaigns:campaign:read"}, documentation_type="admin") == ()
@@ -418,8 +445,9 @@ def test_static_campaign_handbook_has_unique_ids_help_contexts_and_no_planned_re
         "campaign.template",
         "campaign.template.content-library",
         "campaigns.action.schedule-drafts",
-        "campaign.attachments",
-        "campaign.attachments.residual-files",
+            "campaign.attachments",
+            "campaign.attachments.reuse-policy",
+            "campaign.attachments.residual-files",
         "campaign.recipients",
         "campaign.recipient-data",
         "campaign.server-settings",