Introduce Project ID for context management, finalizing the stateful API pipeline from file submission to graph construction.

backend/app/services/__init__.py

@@ -0,0 +1,10 @@
+"""
+业务服务模块
+"""
+
+from .ontology_generator import OntologyGenerator
+from .graph_builder import GraphBuilderService
+from .text_processor import TextProcessor
+
+__all__ = ['OntologyGenerator', 'GraphBuilderService', 'TextProcessor']
+