fix: pipeline_service和pipeline_sdlc导入改为可选，缺失时优雅降级

app/pipeline_app.py

@@ -17,8 +17,15 @@ def init():
     from pipeline_core.init import load_pipeline_core
     from pipeline_ops.init import load_pipeline_ops
     from pipeline_dist.init import load_pipeline_dist
-    from pipeline_service.init import load_pipeline_service
-    from pipeline_sdlc.adapter import load_sdlc_adapter
+    try:
+        from pipeline_service.init import load_pipeline_service
+    except ImportError:
+        def load_pipeline_service(): pass
+
+    try:
+        from pipeline_sdlc.adapter import load_sdlc_adapter
+    except ImportError:
+        def load_sdlc_adapter(): pass
     from showcase.init import load_showcase
     from ktv_adapter import load_ktv_adapter
     from global_func import set_globalvariable