```

refactor(core): 重构核心模块结构并更新导入路径

- 将配置相关的设置从 app.core.config 移除
- 将常量定义从 app.core.constants 移除
- 将数据库相关功能从 app.core.database 移除
- 将基础数据库模型从 app.core.db_base 移除
- 将敏感信息掩码功能从 app.core.masking 移除
- 将中间件定义从 app.core.middleware 移除
- 将操作保护功能从 app.core.operation_guard 移除
- 将分页工具从 app.core.pagination 移除
- 将请求上下文管理从 app.core.request_context 移除
- 将调度器功能从 app.core.scheduler 移除
- 将安全认证逻辑从 app.core.security 移除
- 将任务队列相关功能从 app.core.task_queue 移除
- 将时间工具从 app.core.time 移除
- 更新 alembic 配置中的 Base 模型导入路径
- 更新各模块中对重构后组件的引用路径
```

app/core/background/__init__.py

@@ -0,0 +1 @@
+"""Background scheduler and queue helpers."""

app/core/background/scheduler.py

@@ -33,7 +33,7 @@ def create_scheduler(app: FastAPI | None = None) -> Any:
     from apscheduler.schedulers.background import BackgroundScheduler
 
     from app.core.database import SessionLocal
-    from app.core.task_queue import (
+    from app.core.background.task_queue import (
         enqueue_daily_brief_push,
         enqueue_event_dispatch,
         enqueue_legacy_project_sync,

app/core/config/__init__.py

@@ -0,0 +1,3 @@
+from app.core.config.settings import Settings, get_settings
+
+__all__ = ["Settings", "get_settings"]

app/core/constants/__init__.py

@@ -0,0 +1,23 @@
+from app.core.constants.values import (
+    BEARER_TOKEN_TEMPLATE,
+    DEFAULT_MODEL_PROVIDER,
+    DEFAULT_OPENCLAW_ACTION_JSON,
+    ActorValue,
+    ApiResponseKey,
+    ApiStatus,
+    ConfigErrorDetail,
+    HttpHeader,
+    SecurityErrorDetail,
+)
+
+__all__ = [
+    "ActorValue",
+    "ApiResponseKey",
+    "ApiStatus",
+    "BEARER_TOKEN_TEMPLATE",
+    "ConfigErrorDetail",
+    "DEFAULT_MODEL_PROVIDER",
+    "DEFAULT_OPENCLAW_ACTION_JSON",
+    "HttpHeader",
+    "SecurityErrorDetail",
+]

app/core/database/__init__.py

@@ -0,0 +1,30 @@
+from typing import Any
+
+from app.core.database.base import Base
+
+__all__ = [
+    "Base",
+    "LegacySessionLocal",
+    "SessionLocal",
+    "engine",
+    "get_db",
+    "get_legacy_db",
+    "legacy_engine",
+]
+
+_SESSION_EXPORTS = {
+    "LegacySessionLocal",
+    "SessionLocal",
+    "engine",
+    "get_db",
+    "get_legacy_db",
+    "legacy_engine",
+}
+
+
+def __getattr__(name: str) -> Any:
+    if name in _SESSION_EXPORTS:
+        from app.core.database import session
+
+        return getattr(session, name)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")

app/core/database/session.py

@@ -4,7 +4,8 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import Session, sessionmaker
 
 from app.core.config import get_settings
-from app.core.db_base import Base
+
+from .base import Base
 
 
 settings = get_settings()

app/core/http/__init__.py

@@ -0,0 +1 @@
+"""HTTP middleware, masking, pagination, and request context helpers."""

app/core/http/middleware.py

@@ -4,7 +4,7 @@ from collections.abc import Callable
 from fastapi import Request, Response
 
 from app.core.constants import HttpHeader
-from app.core.request_context import reset_request_id, set_request_id
+from app.core.http.request_context import reset_request_id, set_request_id
 
 
 async def request_id_middleware(request: Request, call_next: Callable) -> Response:

app/core/security/__init__.py

@@ -0,0 +1,13 @@
+from app.core.security.api_keys import ApiPrincipal, require_api_key, require_audit_api_key
+from app.core.security.operation_guard import (
+    READ_ONLY_OPERATION_DISABLED,
+    require_operations_enabled,
+)
+
+__all__ = [
+    "ApiPrincipal",
+    "READ_ONLY_OPERATION_DISABLED",
+    "require_api_key",
+    "require_audit_api_key",
+    "require_operations_enabled",
+]

app/core/utils/__init__.py

@@ -0,0 +1 @@
+"""Core utility helpers."""