Support more search parameters in AzureSearch VectorStore

[denisw]

Checked

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Feature request

Extend the search methods of the AzureSearch vector store so that they accept some of the currently unexposed Azure AI Search search parameters, such as:

• scoringProfile: Choose a non-default scoring profile for sorting
• searchFields: Specify which fields are included in keyword search (for hybrid_search)
• searchMode: Choose whether all or just one query term must match (for hybrid_search)
• select: Specify a subset of fields to return for each document

Motivation

The current limitations make AzureSearch and AzureSearchVectorStoreRetriever unusable when more control is needed than currently provided. It should not be required to write a custom vector store / retriever implementation just to be able to pass an additional search parameter.

Proposal (If applicable)

Support at least the following keyword arguments for all AzureSearch search methods:

• scoring_profile: str
• select: list[str]

And the following for methods that perform hybrid searches:

• search_fields: list[str]
• search_mode: str