Cosmos/FTS: Fuzzy search

[roji]

This is in public preview for the moment:

WHERE FullTextContains(c.text, {"term": "red", "distance":1}, {"term": "bicycle", "distance": 2})

• https://devblogs.microsoft.com/cosmosdb/new-generally-available-and-preview-search-capabilities-in-azure-cosmos-db-for-nosql/#public-preview:-fuzzy-search
• https://learn.microsoft.com/en-us/azure/cosmos-db/gen-ai/full-text-search#fuzzy-search-preview

[Vanshika-lytx]

Hi! I'd like to work on this. Here's what I plan to do in the PR:

Add a FuzzyTerm class to represent { term: string, distance: number }
Extend EF.Functions.FullTextContains to accept FuzzyTerm[] as input
Update CosmosMethodCallTranslator to recognize and translate the new overload
Modify CosmosSqlQueryGenerator to generate correct Cosmos SQL for fuzzy terms
Add functional tests to verify correct translation and behavior

Let me know if this looks good — happy to get started!

[roji]

@Vanshika-lytx sounds good - looking forward to reviewing your PR!

[roji]

Note: did some partial work on this, but shelving for now - the 10.0.0-rc.1 cutoff is too close, and there are some non-trivial issues (specifically around parameterization of custom .NET type (CosmosFuzzySearchTerm) and sending them as JSON, etc. See work in the CosmosFuzzySearch branch.