feat: 更新 ConfigManager 初始化，支持配置自动升级并添加相应测试

pytests/config_test/test_config_manager_startup_upgrade.py

@@ -0,0 +1,33 @@
+from typing import Any
+
+import pytest
+
+from src.config import config as config_module
+from src.config.config import Config, ConfigManager, ModelConfig
+
+
+class _StartupUpgradeExit(Exception):
+    pass
+
+
+def test_initialize_upgrades_bot_and_model_config_before_exit(monkeypatch):
+    manager = ConfigManager()
+    loaded_config_classes: list[type[Any]] = []
+    exit_codes: list[int | None] = []
+
+    def fake_load_config_from_file(config_class, config_path, new_ver, override_repr=False):
+        loaded_config_classes.append(config_class)
+        return object(), True
+
+    def fake_exit(code: int | None = None):
+        exit_codes.append(code)
+        raise _StartupUpgradeExit
+
+    monkeypatch.setattr(config_module, "load_config_from_file", fake_load_config_from_file)
+    monkeypatch.setattr(config_module.sys, "exit", fake_exit)
+
+    with pytest.raises(_StartupUpgradeExit):
+        manager.initialize()
+
+    assert loaded_config_classes == [Config, ModelConfig]
+    assert exit_codes == [0]