VectorDataType: Adds Support for Float16 Data Type

[kundadebdatta]

Pull Request Template

Description

This PR adds the support for Float16 in VectorDataType. The Float16 value for the vector data type is now supported from the backend, Therefore, the goal of this PR is to add the support back in the VectorDataType.

{
    "indexingPolicy": {
        "automatic": true,
        "indexingMode": "Consistent",
        "includedPaths": [
            {
                "path": "/*",
                "indexes": []
            }
        ],
        "excludedPaths": [],
        "compositeIndexes": [],
        "spatialIndexes": [],
        "vectorIndexes": [
            {
                "path": "/vector1",
                "type": "flat"
            },
            {
                "path": "/vector2",
                "type": "quantizedFlat",
                "quantizationByteSize": 3,
                "vectorIndexShardKey": [
                    "/Country"
                ]
            },
            {
                "path": "/vector3",
                "type": "diskANN",
                "quantizationByteSize": 2,
                "indexingSearchListSize": 100,
                "vectorIndexShardKey": [
                    "/ZipCode"
                ]
            }
        ]
    },
    "vectorEmbeddingPolicy": {
        "vectorEmbeddings": [
            {
                "path": "/vector1",
                "dataType": "int8",
                "dimensions": 1200,
                "distanceFunction": "dotproduct"
            },
            {
                "path": "/vector2",
                "dataType": "uint8",
                "dimensions": 3,
                "distanceFunction": "cosine"
            },
            {
                "path": "/vector3",
                "dataType": "float32",
                "dimensions": 400,
                "distanceFunction": "euclidean"
            },
            {
                "path": "/vector4",
                "dataType": "float16",
                "dimensions": 3,
                "distanceFunction": "dotproduct"
            }
        ]
    },
    "id": "test_vector_container",
    "partitionKey": {
        "paths": [
            "/pk"
        ],
        "kind": "Hash"
    }
}

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Closing issues

To automatically close an issue: closes #5367

[Copilot]

Pull Request Overview

This PR adds support for the Float16 data type to the VectorDataType enum in the Azure Cosmos DB .NET SDK. The backend now supports Float16 vectors, so this change enables the SDK to utilize this new data type.

• Adds Float16 enum value to VectorDataType with proper serialization attribute
• Updates test data to include Float16 vector embedding examples
• Updates API contract tests to verify the new enum member

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
VectorDataType.cs	Adds Float16 enum value with EnumMember attribute
SettingsContractTests.cs	Updates test data and assertions to include Float16 vector embedding
DotNetSDKAPI.json	Updates API contract to include the new Float16 enum member

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