feat(archive): complete recorded session lifecycle

tests/test_session_recording.py

@@ -129,6 +129,25 @@ def test_materializer_reuses_only_a_digest_validated_private_cache(tmp_path: Pat
     assert exporter.calls == 1
 
 
+def test_delete_cached_refuses_a_live_lease_then_removes_the_exact_cache(
+    tmp_path: Path,
+) -> None:
+    command = _command(tmp_path / "source")
+    materializer = SessionRecordingMaterializer(
+        tmp_path / "private",
+        exporter=FakeExporter(),
+    )
+    recording, release = materializer.materialize_pinned(command)
+
+    assert materializer.delete_cached(command.session_id) is False
+    assert recording.path.is_file()
+
+    release()
+    assert materializer.delete_cached(command.session_id) is True
+    assert not recording.path.parent.exists()
+    assert command.primary_artifact.path.is_file()
+
+
 def test_materializer_rejects_changed_digest_bound_secondary_artifact(
     tmp_path: Path,
 ) -> None: