feat：LLM 分析文件并生成结构化建议

app/observability/tracing.py

@@ -55,14 +55,21 @@ def flush_tracing() -> None:
         logger.opt(exception=exc).warning("Langfuse flush 失败")
 
 
-async def astream_screen(graph, payload, *, thread_id, session_id=None, user_id=None):
-    """同一轮流保持同一个追踪上下文，关闭流时结束追踪"""
+async def astream_screen(
+    graph, payload, *, thread_id, session_id=None, user_id=None, context=None
+):
+    """同一轮流保持同一个追踪上下文，关闭流时结束追踪；context 是图的运行上下文，不进检查点"""
     from contextlib import aclosing
 
     result = {}
     with _screen_trace(payload, thread_id, session_id, user_id) as (config, root):
         async with aclosing(
-            graph.astream(payload, config=config, stream_mode=["custom", "values"])
+            graph.astream(
+                payload,
+                config=config,
+                context=context,
+                stream_mode=["custom", "values"],
+            )
         ) as events:
             async for mode, data in events:
                 if mode == "values":