chore: initial commit for Pretor v0.1.0-alpha

正式发布 Pretor 平台的首个 alpha 版本。本项目旨在构建一个基于分布式架构的多智能体协同工作流水线。

核心功能实现：
1. 建立基于 BaseIndividual 的动态插件加载机制。
2. 实现三类核心 worker_individual 子个体。
3. 集成 Ray 框架支持分布式集群调度。
4. 基于 PostgreSQL 的全量持久化存储方案。
5. 提供完整的 FastAPI 后端与 React 前端交互界面。

tests/core/database/postgres_test.py

@@ -0,0 +1,78 @@
+import pytest
+from unittest.mock import patch, MagicMock
+import sys
+import builtins
+
+real_import = builtins.__import__
+
+
+def mock_import(name, globals=None, locals=None, fromlist=(), level=0):
+    if name == 'ray':
+        mock_ray = MagicMock()
+
+        def mock_remote(*args, **kwargs):
+            if len(args) == 1 and callable(args[0]):
+                return args[0]
+            def decorator(cls):
+                return cls
+            return decorator
+
+        mock_ray.remote = mock_remote
+        return mock_ray
+    return real_import(name, globals, locals, fromlist, level)
+
+
+builtins.__import__ = mock_import
+for mod in list(sys.modules.keys()):
+    if 'pretor.core.database.postgres' in mod or 'ray' in mod:
+        del sys.modules[mod]
+
+from pretor.core.database.postgres import PostgresDatabase
+
+builtins.__import__ = real_import
+
+
+@patch("pretor.core.database.postgres.create_async_engine")
+@patch("pretor.core.database.postgres.sessionmaker")
+@patch("pretor.core.database.postgres.AuthDatabase")
+@patch("pretor.core.database.postgres.ProviderDatabase")
+@patch("pretor.core.database.postgres.os.environ.get")
+@pytest.mark.asyncio
+async def test_postgres_database(mock_env_get, mock_provider_db, mock_auth_db, mock_sessionmaker, mock_create_engine):
+    def env_side_effect(key):
+        return {
+            "POSTGRES_USER": "testuser",
+            "POSTGRES_PASSWORD": "testpassword",
+            "POSTGRES_HOST": "localhost",
+            "POSTGRES_PORT": "5432",
+            "POSTGRES_DB": "testdb"
+        }.get(key)
+
+    mock_env_get.side_effect = env_side_effect
+
+    mock_engine = MagicMock()
+    mock_conn = MagicMock()
+    from unittest.mock import AsyncMock
+    mock_conn.run_sync = AsyncMock()
+
+    mock_begin_ctx = MagicMock()
+    mock_begin_ctx.__aenter__ = AsyncMock(return_value=mock_conn)
+    mock_begin_ctx.__aexit__ = AsyncMock()
+    mock_engine.begin.return_value = mock_begin_ctx
+    mock_create_engine.return_value = mock_engine
+
+    db = PostgresDatabase()
+
+    mock_create_engine.assert_called_once_with(
+        "postgresql+asyncpg://testuser:testpassword@localhost:5432/testdb",
+        echo=True
+    )
+    mock_auth_db.assert_called_once()
+    mock_provider_db.assert_called_once()
+    mock_auth_db.return_value.get_user_authority = AsyncMock(return_value="test_auth")
+
+    with patch("pretor.core.database.postgres.SQLModel.metadata.create_all") as mock_create_all:
+        await db.init_db()
+        mock_conn.run_sync.assert_called_once_with(mock_create_all)
+
+    assert await db.get_user_authority(user_id="123") == "test_auth"