Add missing langchain-chroma dependency

requirements.txt

@@ -9,6 +9,7 @@ langchain-google-genai==4.2.1
 # ── RAG / Vector store ────────────────────────────────────────────────────────
 # chromadb version is managed by crewai (crewai 1.10.1 requires ~=1.1.0)
 chromadb>=1.1.0,<1.2.0
+langchain-chroma>=0.1.0
 sentence-transformers==5.3.0
 
 # ── Data processing ───────────────────────────────────────────────────────────