🏗️ 项目重构：模块化清理完成

modules/documentation-suite/docs/architecture/data_flow_diagram.mermaid

@@ -0,0 +1,9 @@
+graph TD
+    A[User Request] --> B{OpenBB Installed?}
+    B -- Yes --> C{OpenBB Data Available?}
+    C -- Yes --> D[OpenBB Engine]
+    C -- No --> E[Fallback to Demo/Synthetic Data]
+    B -- No --> E
+    D --> F[Format Data]
+    E --> F
+    F --> G[Return to Agent/UI]