Revert to langchain 0.3.x compatible imports

Author: anas-elghafari

backend/src/mapping_generation/compress.py

@@ -1,11 +1,11 @@
 from typing import Any, List
-from langchain.retrievers.contextual_compression import ContextualCompressionRetriever
+from langchain.retrievers import ContextualCompressionRetriever
 from langchain_core.callbacks import (
     AsyncCallbackManagerForRetrieverRun,
     CallbackManagerForRetrieverRun,
 )
 from langchain_core.documents import Document
-from langchain.retrievers.merger_retriever import MergerRetriever
+from langchain.retrievers import MergerRetriever
 from langchain_core.retrievers import BaseRetriever
 import asyncio
 

backend/src/mapping_generation/embeddingfilter.py

@@ -2,8 +2,8 @@
 from typing import List, Optional
 
 import numpy as np
-from langchain_core.embeddings import Embeddings
-from langchain.retrievers.document_compressors.embeddings_filter import EmbeddingsFilter
+from langchain.embeddings.base import Embeddings
+from langchain.retrievers.document_compressors import EmbeddingsFilter
 from langchain_community.document_transformers.embeddings_redundant_filter import _DocumentWithState
 from langchain_core.callbacks.manager import Callbacks
 from langchain_core.documents import Document

backend/src/mapping_generation/llm_chain.py

@@ -9,7 +9,7 @@
 from .utils import global_logger as logger
 from pydantic.v1 import ValidationError
 from langchain_core.output_parsers import JsonOutputParser
-from langchain_core.output_parsers import OutputFixingParser
+from langchain.output_parsers import OutputFixingParser
 from typing import List, Dict, Any
 import time
 from langchain_core.callbacks.base import BaseCallbackHandler