test(rules): rules_payload fixtures carry a title, as every rule_brief does (#4081)

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy

tests/test_rule_usage_wiring.py

@@ -327,8 +327,9 @@ def test_rules_payload_records_both_the_family_and_project_halves():
     with patch.object(svc, "record_rule_surfaced", rec):
         svc.rules_payload(
             {
-                "rules": [{"id": 10}, {"id": 11}],
-                "project_rules": [{"id": 12}],
+                # rule_brief always carries a title; a listing names each rule.
+                "rules": [{"id": 10, "title": "a"}, {"id": 11, "title": "b"}],
+                "project_rules": [{"id": 12, "title": "c"}],
                 "truncated": False,
             },
             user_id=1,