Update retriever imports to use langchain_classic for v1 compatibility #1196
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The langchain.retrievers module was removed in LangChain 1.0+.
All retriever imports have been updated to use langchain_classic as documented in the v1 migration guide.
Fixes #1195
Summary
Updated outdated retriever imports that don't work in LangChain 1.0+. Changed
from langchain.retrieverstofrom langchain_classic.retrieversas per the v1 migration guide.Changes
31 files updated across integrations:
Before:
After:
All changes follow the pattern in the v1 migration guide.