Normalize session CLI counters (#1578)

* Normalize session CLI counters

* Keep sessions CLI test imports isolated

tests/test_sessions_cli.py

@@ -0,0 +1,48 @@
+import importlib.machinery
+import importlib.util
+import sys
+from pathlib import Path
+from types import ModuleType
+from types import SimpleNamespace
+
+
+def _load_sessions_cli(monkeypatch):
+    core_mod = ModuleType("core")
+    database_mod = ModuleType("core.database")
+    database_mod.SessionLocal = object
+    database_mod.Session = object
+    monkeypatch.setitem(sys.modules, "core", core_mod)
+    monkeypatch.setitem(sys.modules, "core.database", database_mod)
+
+    path = Path(__file__).resolve().parent.parent / "scripts" / "odysseus-sessions"
+    loader = importlib.machinery.SourceFileLoader("odysseus_sessions_cli_under_test", str(path))
+    spec = importlib.util.spec_from_loader(loader.name, loader)
+    module = importlib.util.module_from_spec(spec)
+    loader.exec_module(module)
+    return module
+
+
+def test_serialize_normalizes_numeric_counters(monkeypatch):
+    cli = _load_sessions_cli(monkeypatch)
+    session = SimpleNamespace(
+        id="s1",
+        name="chat",
+        model="m",
+        endpoint_url="",
+        owner=None,
+        folder=None,
+        archived=False,
+        rag=False,
+        is_important=False,
+        message_count="12",
+        total_input_tokens="bad",
+        total_output_tokens=None,
+        last_accessed=None,
+        created_at=None,
+    )
+
+    out = cli._serialize(session)
+
+    assert out["message_count"] == 12
+    assert out["total_input_tokens"] == 0
+    assert out["total_output_tokens"] == 0