chore: 搭建项目骨架

- pyproject：hatchling + src 布局，核心依赖 psycopg/pydantic/pyyaml/cel-python
- FastAPI 归入 [api] 可选依赖，开发依赖走 PEP 735 dependency-groups
- 建立分层目录：ontology/compiler/storage/repository/graph/timeseries/expr/rules/api
- errors.py 统一异常基类；py.typed 标记类型完整
- ruff(100) + pytest 配置；冒烟测试校验核心包不引入 fastapi/uvicorn

tests/test_smoke.py

@@ -0,0 +1,38 @@
+"""骨架冒烟测试：包能导入，且核心包不拉起 web 依赖（AGENTS.md §5 硬规则）。"""
+
+from __future__ import annotations
+
+import subprocess
+import sys
+
+
+def test_package_imports() -> None:
+    import adapter_python_pg
+
+    assert adapter_python_pg.__version__ == "0.1.0"
+
+
+def test_core_import_does_not_pull_fastapi() -> None:
+    """在干净的解释器里 import 核心包，sys.modules 不应出现 fastapi / uvicorn。"""
+    code = (
+        "import sys, adapter_python_pg;"
+        "assert 'fastapi' not in sys.modules, 'core imported fastapi';"
+        "assert 'uvicorn' not in sys.modules, 'core imported uvicorn';"
+        "print('ok')"
+    )
+    result = subprocess.run(
+        [sys.executable, "-c", code],
+        capture_output=True,
+        text=True,
+    )
+    assert result.returncode == 0, result.stderr
+    assert result.stdout.strip() == "ok"
+
+
+def test_unknown_attribute_raises() -> None:
+    import pytest
+
+    import adapter_python_pg
+
+    with pytest.raises(AttributeError):
+        _ = adapter_python_pg.nonexistent_attribute