prepare fastapi root layout for server deployment

app/services/knowledge_service.py

@@ -0,0 +1,33 @@
+from sqlalchemy.orm import Session
+
+from app.repositories.knowledge_repository import KnowledgeRepository
+
+
+class KnowledgeService:
+    """知识库服务：检索评分参考指南并整理来源引用。"""
+
+    def __init__(self, db: Session) -> None:
+        self.repo = KnowledgeRepository(db)
+
+    def search_guidelines(self, department_id: int, training_type: str, keywords: list[str]) -> dict:
+        """指南检索：根据科室、任务类型和关键词返回评分参考片段。"""
+        chunks = self.repo.search_chunks(department_id=department_id, task_type=training_type, keywords=keywords)
+        matched_chunks = [
+            {
+                "chunk_id": chunk.id,
+                "document_id": chunk.document_id,
+                "text": chunk.chunk_text,
+                "keywords": chunk.keywords or [],
+                "weight": float(chunk.weight),
+            }
+            for chunk in chunks
+        ]
+        source_refs = [
+            {
+                "document_id": chunk.document_id,
+                "title": chunk.document.title if chunk.document else "",
+                "chunk_id": chunk.id,
+            }
+            for chunk in chunks
+        ]
+        return {"matched_chunks": matched_chunks, "source_refs": source_refs, "no_match": not matched_chunks}