feat：qa knowledge recommend question add error code

Author: zgqgit

src/backend/bisheng/api/services/knowledge_imp.py

@@ -40,7 +40,7 @@
 from bisheng.common.errcode import BaseErrorCode
 from bisheng.common.errcode.knowledge import KnowledgeSimilarError, KnowledgeFileDeleteError, KnowledgeFileEmptyError, \
     KnowledgeFileChunkMaxError, KnowledgeLLMError, KnowledgeFileDamagedError, KnowledgeFileNotSupportedError, \
-    KnowledgeEtl4lmTimeoutError, KnowledgeFileFailedError, KnowledgeExcelChunkMaxError
+    KnowledgeEtl4lmTimeoutError, KnowledgeFileFailedError, KnowledgeExcelChunkMaxError, KnowledgeRecommendQuestionError
 from bisheng.common.schemas.telemetry.event_data_schema import FileParseEventData
 from bisheng.common.services import telemetry_service
 from bisheng.common.services.config_service import settings
@@ -1567,7 +1567,7 @@ def recommend_question(invoke_user_id: int, question: str, answer: str, number:
         return []
     except Exception as exc:
         logger.error("recommend_question json.loads error:{}", gen_question)
-        raise ValueError(gen_question) from exc
+        raise KnowledgeRecommendQuestionError(exception=exc, message=gen_question)
 
 
 def extract_code_blocks(markdown_code_block: str):

src/backend/bisheng/common/errcode/knowledge.py

@@ -99,6 +99,11 @@ class KnowledgeNotQAError(BaseErrorCode):
     Msg: str = 'Is notQAThe knowledge base upon'
 
 
+class KnowledgeRecommendQuestionError(BaseErrorCode):
+    Code: int = 10961
+    Msg: str = 'The model returned an incorrect format: {message}'
+
+
 # Knowledge base does not exist
 class KnowledgeNotExistError(BaseErrorCode):
     Code: int = 10970