refactor(deps): migrate langchain-community from 0.2.10 to 0.4.1

[s0wa48]

Changes

Dependency version bump

• Updated langchain-community from 0.2.10 to 0.4.1 in requirements.txt

Breaking change: Chroma vectorstore import moved

• In langchain-community 0.3+, the Chroma vectorstore was removed from langchain_community.vectorstores.chroma and fully migrated to the standalone langchain-chroma package.
• Updated agents/connectors/chroma.py to import Chroma from langchain_chroma instead of the deprecated langchain_community.vectorstores.chroma.
• The langchain-chroma package (langchain-chroma==0.1.2) was already present in requirements.txt, so no additional dependency changes are required.

Migration details

• Before: from langchain_community.vectorstores.chroma import Chroma
• After: from langchain_chroma import Chroma
• All call sites (Chroma.from_documents(...), Chroma(persist_directory=..., embedding_function=...), .similarity_search_with_score(...)) remain compatible — the API surface of langchain_chroma.Chroma is identical to the old community version.

---

This PR was auto-generated by Gittensor upgrade bot using Claude AI

---

Note

Low Risk
Low risk import-only change, but it can break runtime if langchain_chroma isn’t installed or differs from the previous langchain_community implementation.

Overview
Updates PolymarketRAG to import Chroma from the standalone langchain_chroma package instead of langchain_community.vectorstores.chroma, aligning with newer LangChain packaging.

^{Written by Cursor Bugbot for commit 969564f. This will update automatically on new commits. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

[s0wa48]

Reverted langchain-community from 0.4.1 back to 0.2.10 to resolve the version conflict. langchain-community==0.4.1 requires langchain-core>=1.0.1,<2.0.0, which is incompatible with the 0.2.x versions of langchain-core, langchain, langchain-openai, langgraph, and other ecosystem packages pinned in requirements.txt. Upgrading langchain-community to 0.4.x would require a coordinated upgrade of the entire langchain ecosystem.