Feature Request: Native OpenSearch Support as a Vector Store in Mem0

Feature Request: Native OpenSearch Support as a Vector Store in Mem0: a task in LegoFlow-SWE (Harbor dataset). Summary Mem0 currently does not support OpenSearch as a vector store backend. OpenSearch is a widely adopted open-source search and analytics suite with strong k‑NN vector search…

The task

**Summary** Mem0 currently does not support OpenSearch as a vector store backend. OpenSearch is a widely adopted open-source search and analytics suite with strong k‑NN vector search capabilities. Many users need to use Mem0 alongside an existing OpenSearch cluster without having to switch to another vector store.

Part of Lego-X/LegoFlow-SWE.