docs: add ZeusDB vector store integration

[doubleinfinity]

Description

This PR adds documentation for the new ZeusDB vector store integration with LangChain.

Motivation

ZeusDB is a high-performance vector database (Python/Rust backend) designed for AI applications that need fast similarity search and real-time vector ops. This integration brings ZeusDB's capabilities to the LangChain ecosystem, giving developers another production-oriented option for vector storage and retrieval.

Key Features:

• User-Friendly Python API: Intuitive interface that integrates seamlessly with Python ML workflows
• High Performance: Powered by a robust Rust backend for lightning-fast vector operations
• Enterprise Logging: Comprehensive logging capabilities for monitoring and debugging production systems
• Advanced Features: Includes product quantization and persistence capabilities
• AI-Optimized: Purpose-built for modern AI applications and RAG pipelines

Changes

• Added provider documentation: docs/docs/integrations/providers/zeusdb.mdx (installation, setup).

• Added vector store documentation: docs/docs/integrations/vectorstores/zeusdb.ipynb (quickstart for creating/querying a ZeusDBVectorStore).

• Registered langchain-zeusdb in libs/packages.yml for discovery.

Target users

• AI/ML engineers building RAG pipelines

• Data scientists working with large document collections

• Developers needing high-throughput vector search

• Teams requiring near real-time vector operations

Testing

• Followed LangChain's "How to add standard tests to an integration" guidance.
• Code passes format, lint, and test checks locally.
• Tested with LangChain Core 0.3.74
• Works with Python 3.10 to 3.13

Package Information

PyPI: https://pypi.org/project/langchain-zeusdb
Github: https://github.com/ZeusDB/langchain-zeusdb

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Project	Deployment	Preview	Comments	Updated (UTC)
langchain	Ready	Preview	Comment	Sep 5, 2025 7:34am

[codspeed-hq]

CodSpeed WallTime Performance Report

Merging #32822 will not alter performance

_{Comparing ZeusDB:master (fd03c5c) with master (bc91a48)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 13 untouched benchmarks

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #32822 will not alter performance

_{Comparing ZeusDB:master (fd03c5c) with master (bc91a48)}

Summary

✅ 14 untouched benchmarks