Add configurable HTTP logging to prevent verbose output from GitHub operations

[Copilot]

GitHub API operations (especially file uploads) were logging full request/response bodies including binary streams, generating >15,000 lines of output per operation.

Changes

Configuration

• Added PipelineOptions.DefaultHttpLogging (default: StatusCode | Duration)
• Added GitHubOptions.HttpLogging for per-integration override
• Reused existing HttpLoggingType flags: None, Request, Response, StatusCode, Duration

Implementation

• Modified GitHub.cs to conditionally add HTTP handlers based on configured logging level
• Handler chain now built dynamically instead of always including all handlers

Testing & Documentation

• Added unit tests for configuration scenarios
• Updated GitHub package docs with usage examples

Usage

// Default: only status codes and duration (no request/response bodies)
await PipelineHostBuilder.Create()
    .ExecutePipelineAsync();

// Disable HTTP logging entirely
await PipelineHostBuilder.Create()
    .ConfigureServices((_, services) =>
    {
        services.Configure<GitHubOptions>(opt => 
            opt.HttpLogging = HttpLoggingType.None);
    })
    .ExecutePipelineAsync();

// Enable verbose logging when debugging
services.Configure<GitHubOptions>(opt => 
    opt.HttpLogging = HttpLoggingType.Request | HttpLoggingType.Response);

Impact

• Default behavior prevents log spam while retaining useful debugging info
• Pattern consistent with existing CommandLogging configuration
• No breaking changes

Original prompt

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This section details on the original issue you should resolve

<issue_title>IHttpLogger spams messages</issue_title>
<issue_description>The ModularPipelines.GitHub.GitHub class has IHttpLogger, but it is overly aggressive. For example, for a call to

        return await targetFiles
            .SelectAsync(async file =>
                {
                    var asset = new ReleaseAssetUpload
                    {
                        ContentType = "application/x-binary",
                        FileName = file.Name,
                        RawData = file.GetStream()
                    };

                    return await context.GitHub().Client.Repository.Release.UploadAsset(release, asset, cancellationToken);
                },
                cancellationToken)
            .ProcessOneAtATime();

I get >15,000 lines in the output. The current implementation even logs the stream of the uploaded file.

Ideally nice to have something like CommandLogging in Commands, to control it</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes IHttpLogger spams messages #1318

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