[Release] Manual verification vector stores section of user documentation

[yunfengzhou-hub]

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Description

https://nightlies.apache.org/flink/flink-agents-docs-main/docs/development/vector_stores/

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[yunfengzhou-hub]

Verification completed. All documented features work as described.

What I verified:

• Chroma in-memory mode: add, query, get, delete, metadata
• Chroma persistent mode: persist_directory, data survives agent restart
• Filter DSL: equality shorthand filters={"key": "value"}
• ContextRetrievalRequestEvent / ContextRetrievalResponseEvent built-in action flow
• Custom provider: BaseVectorStore subclassing with _query_embedding, _add_embedding, _update_embedding, store_kwargs
• Java compilation: Elasticsearch @VectorStore annotation, Document / VectorStoreQuery construction
• Source code review: Amazon OpenSearch, Amazon S3 Vectors, Milvus (I don't have these resources)

Not verified (environment limitation):

• Elasticsearch / Milvus E2E (Docker images crash with SIGILL on Apple Silicon ARM64)
• Chroma server / cloud mode (no Chroma server or cloud account)
• Cross-language wrapper (the only Java vector stores are ES/Milvus, both have the same ARM64 limitation)

Issues found: None.