chore: 删除 tests/ 空壳目录

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/conftest.py

@@ -1,26 +0,0 @@
-"""全局测试 fixtures。"""
-import pytest
-
-
-@pytest.fixture(scope="session")
-def config_handler():
-    """会话级：配置读取器。"""
-    from foundation.infrastructure.config.config import config_handler
-    return config_handler
-
-
-@pytest.fixture(scope="session")
-def model_handler():
-    """会话级：模型客户端管理器。"""
-    from foundation.ai.models.model_handler import model_handler
-    return model_handler
-
-
-@pytest.fixture
-async def redis_client():
-    """函数级：Redis 连接（测试后自动清理）。"""
-    from foundation.infrastructure.cache import RedisConnectionFactory
-    client = RedisConnectionFactory.get()
-    yield client
-    for key in client.keys("test:*"):
-        client.delete(key)