Adjust default PooledConnectionIdleTimeout to 5 seconds

[alex-clickhouse]

No description provided.

[Copilot]

Pull Request Overview

This PR adjusts the default PooledConnectionIdleTimeout from the system default (2 minutes on .NET Core) to 5 seconds for improved connection lifecycle management. The change introduces a new HttpHandlerProvider to centralize HTTP handler creation logic and enable platform-specific configuration.

Key changes:

• Centralizes HTTP handler creation in a new HttpHandlerProvider class with conditional compilation for .NET Core 2.1+ vs. older frameworks
• Sets PooledConnectionIdleTimeout = 5 seconds for SocketsHttpHandler on .NET Core 2.1+
• Refactors SingleConnectionHttpClientFactory and DefaultPoolHttpClientFactory to use the new provider

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
ClickHouse.Driver/Http/HttpHandlerProvider.cs	New static factory class that creates platform-appropriate HTTP handlers with 5-second idle timeout on .NET Core 2.1+
ClickHouse.Driver/Http/SingleConnectionHttpClientFactory.cs	Refactored to use HttpHandlerProvider.CreateHandler() instead of directly instantiating DefaultHttpClientHandler
ClickHouse.Driver/Http/DefaultPoolHttpClientFactory.cs	Refactored to use HttpHandlerProvider.CreateHandler() instead of directly instantiating DefaultHttpClientHandler

[codecov]

Codecov Report

❌ Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
ClickHouse.Driver/Http/HttpHandlerProvider.cs	92.30%	1 Missing ⚠️

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