Qdrant intergration and Rerank intergration

[nonghaivinh]

Feature Request: Custom OCR, Reranker, and Qdrant Integration
Summary: I would like to propose enhancing OpenNotebook's modularity by allowing users to customize the OCR engine, Reranker, and Vector Database.

Key Proposals:

Custom OCR: Enable support for specialized OCR engines (e.g., PaddleOCR, Google Vision) to better handle complex document layouts and specific languages.

Reranking Layer: Add a configurable Rerank step (e.g., BGE-Reranker, Cohere) after retrieval to improve the precision of the context provided to the LLM.

Qdrant Integration: Allow connection to external Qdrant instances for better scalability, metadata filtering, and performance in large-scale RAG workflows.

Impact: These updates would make OpenNotebook significantly more flexible for production-grade environments and specialized use cases.

[lfnovo]

Thanks for your suggestions.
Reranking is on the roadmap. Qdrant is not.
Custom OCRs must be implemented in the content-core project for availability in Open Notebook.