```

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
```

tests/test_smoke.py

@@ -31,7 +31,7 @@ from fastapi.testclient import TestClient
 
 from app.core.config import Settings, get_settings
 from app.core.database import Base, SessionLocal, engine
-from app.core.pagination import bounded_limit, bounded_offset
+from app.core.http.pagination import bounded_limit, bounded_offset
 from app.core.security import require_api_key, require_audit_api_key
 from app.main import _allow_cors_credentials, app
 from app.modules.audit.constants import AUDIT_REDACTED_VALUE
@@ -268,6 +268,7 @@ def test_v3_event_retry_and_dispatch_pending_route() -> None:
         )
         event.status = EventStatus.FAILED
         event.last_error = "transient"
+        event.attempts = event.max_attempts
         db.commit()
         event_id = event.event_id
     finally:
@@ -276,6 +277,7 @@ def test_v3_event_retry_and_dispatch_pending_route() -> None:
     retry_response = client.post(f"/api/v1/events/{event_id}/retry", headers=headers)
     assert retry_response.status_code == 200
     assert retry_response.json()["event"]["status"] == EventStatus.PENDING
+    assert retry_response.json()["event"]["attempts"] == 0
 
     dispatch_response = client.post("/api/v1/events/dispatch-pending", headers=headers)
     assert dispatch_response.status_code == 200