feat: 完成input_context节点

app/processor/base.py

@@ -1,9 +1,12 @@
 import logging
 import time
 from abc import ABC, abstractmethod
-from typing import TypeVar
+from typing import TYPE_CHECKING, TypeVar
 
-from app.config import Settings, settings
+from pydantic import ValidationError
+
+if TYPE_CHECKING:
+    from app.config import Settings
 from app.exceptions import AppError, ImportProcessError
 
 T = TypeVar("T")
@@ -12,18 +15,26 @@ T = TypeVar("T")
 class BaseNode(ABC):
     name: str = "base_node"
 
-    def __init__(self, config: Settings | None = None):
-        """传入配置时使用传入值，否则使用全局配置"""
-        self.config = config if config is not None else settings
+    def __init__(self, config: "Settings | None" = None):
+        """保存显式配置；全局配置在节点实际使用时才加载。"""
+        self._config = config
         self.logger = logging.getLogger(f"import.{self.name}")
 
+    @property
+    def config(self) -> "Settings":
+        if self._config is None:
+            from app.config import settings
+
+            self._config = settings
+        return self._config
+
     def __call__(self, state: T) -> T:
         """执行节点，统一记录日志、耗时并保留业务异常类型"""
         start_time = time.perf_counter()
         self.logger.info("--- %s 开始 ---", self.name)
         try:
             result = self.process(state)
-        except AppError:
+        except (AppError, ValidationError):
             self.logger.exception("%s 执行失败", self.name)
             raise
         except Exception as e: