Add support for ValueTuple query parameters

[MikeAmputer]

Previously, only Tuple was supported.

Many modern C# APIs and user code prefer ValueTuple, which is also the default type for inline tuples in C# like ("a", 1). Without this, developers had to manually convert ValueTuple to Tuple before passing parameters.

This change adds ValueTuple support with minimal code changes.

[CLAassistant]

All committers have signed the CLA.

[Copilot]

Pull Request Overview

This PR adds support for ValueTuple as query parameters in ClickHouse.Driver. Previously only reference-type Tuple was supported, but modern C# code typically uses value-type ValueTuple (e.g., ("a", 1)). This change enables developers to pass ValueTuple parameters directly without manual conversion.

Key Changes:

• Type converter extended to recognize ValueTuple and map it to ClickHouse Tuple type
• Test coverage added for both simple and nested ValueTuple parameters

Reviewed Changes

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

File	Description
ClickHouse.Driver/Types/TypeConverter.cs	Adds ValueTuple type detection and conversion to ClickHouse Tuple type
ClickHouse.Driver.Tests/Types/TypeMappingTests.cs	Adds test case verifying ValueTuple maps to ClickHouse Tuple type
ClickHouse.Driver.Tests/SQL/SqlParameterizedSelectTests.cs	Adds integration tests for simple and nested ValueTuple parameters in SQL queries

[MikeAmputer]

@alex-clickhouse Hi, could you let me know if there are any blockers or anything else needed before this PR can be merged?