feat(campaign): bound synchronous delivery

tests/test_documentation.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 from types import SimpleNamespace
+from unittest.mock import patch
 
 import pytest
 
@@ -12,6 +13,7 @@ from govoplan_core.core.modules import DocumentationContext
 @dataclass(frozen=True)
 class _Principal:
     scopes: frozenset[str]
+    tenant_id: str = "tenant-1"
 
     def has(self, scope: str) -> bool:
         namespace, resource, _action = scope.split(":", 2)
@@ -181,6 +183,32 @@ def test_runtime_documentation_full_composition_uses_only_user_facing_names() ->
     assert "secret" not in rendered.lower()
 
 
+def test_runtime_documentation_states_the_effective_synchronous_limit() -> None:
+    session = SimpleNamespace(
+        get=lambda _model, _id: SimpleNamespace(
+            settings={
+                "campaign_delivery_policy": {
+                    "synchronous_send_max_recipients": 12,
+                }
+            }
+        )
+    )
+    with patch.dict("os.environ", {"GOVOPLAN_CAMPAIGN_SYNCHRONOUS_SEND_MAX_RECIPIENTS": "25"}):
+        topic = documentation_topics(
+            DocumentationContext(
+                registry=_Registry({"mail.campaign_delivery"}),
+                principal=_Principal(frozenset({"campaigns:campaign:read", "campaigns:campaign:send"})),
+                session=session,
+                documentation_type="user",
+            )
+        )[0]
+
+    assert any(
+        "Send now is limited to 12 eligible recipient job(s)" in item
+        for item in topic.metadata["current_configuration"]
+    )
+
+
 def _visible_static_topics(
     scopes: set[str],
     *,