feat(ansible): a run's scope reads as the target or group it names

#5014 "Ansible run scope is shown as a raw id"

- inventory_gen.describe_scope / scope_labels turn "steward:target:<uuid>"
  into "target web-1", "steward:group:<uuid>" into "group Docker Swarm",
  and a deleted one into "target abcdef01 (deleted)".
- MCP run and schedule rows carry scope_label beside the stored scope; the
  ansible.run.started audit detail records it too.
- The web run page and schedules table show the name, with the stored
  scope as the tooltip.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/core/test_inventory_gen.py

@@ -128,3 +128,13 @@ def test_yaml_injected_hostvars_survive():
 def test_yaml_empty_targets():
     parsed = yaml.safe_load(inventory_to_yaml(generate_inventory([])))
     assert parsed == {"all": {"hosts": {}}}
+
+
+def test_describe_scope_names_what_a_run_targeted():
+    from steward.ansible.inventory_gen import describe_scope
+    targets, groups = {"t1": "web-1"}, {"g1": "Docker Swarm"}
+    assert describe_scope("steward:all", targets, groups) == "all inventory targets"
+    assert describe_scope("steward:target:t1", targets, groups) == "target web-1"
+    assert describe_scope("steward:group:g1", targets, groups) == "group Docker Swarm"
+    assert describe_scope("steward:target:abcdef0123", targets, groups) == "target abcdef01 (deleted)"
+    assert describe_scope("repo:homelab:hosts.yml", targets, groups) == "homelab/hosts.yml"