feat: add Paramore.Brighter.Extensions.OpenTelemetry package

[thomhurst]

Summary

• Adds a new Paramore.Brighter.Extensions.OpenTelemetry package that provides a single OpenTelemetryBuilder.AddBrighterInstrumentation() extension method
• Wires both tracing and metrics in one call by delegating to the existing TracerProviderBuilder and MeterProviderBuilder extensions from Extensions.Diagnostics
• No exporters bundled — follows OTel best practices where users choose their own exporters

Usage

services.AddOpenTelemetry()
    .ConfigureResource(r => r.AddService("MyService"))
    .AddBrighterInstrumentation()                      // one call for tracing + metrics
    .WithTracing(t => t.AddOtlpExporter())             // user chooses exporters
    .WithMetrics(m => m.AddOtlpExporter());

Files changed

• New: src/Paramore.Brighter.Extensions.OpenTelemetry/Paramore.Brighter.Extensions.OpenTelemetry.csproj — targets net8.0;net9.0;net10.0, references Extensions.Diagnostics + OpenTelemetry.Extensions.Hosting
• New: src/Paramore.Brighter.Extensions.OpenTelemetry/OpenTelemetryBuilderExtensions.cs — the extension method
• Modified: Brighter.slnx — added new project to solution

Test plan

• dotnet build src/Paramore.Brighter.Extensions.OpenTelemetry/ succeeds with 0 warnings, 0 errors across all 3 TFMs
• Full solution build (dotnet build Brighter.slnx) passes in CI

🤖 Generated with Claude Code

[iancooper]

Thanks @thomhurst. Trying to clear some build/test issues (capitalizing on your work to allow us to run in parallel), then we can address this. Can you add a (short) ADR, just to follow the process? It helps us as we can generate documentation from the ADRs and we need to do a batch of that with the next release.

[thomhurst]

Sure thing! ADR committed.

Let me know if ya need any help with tests

[codescene-delta-analysis]

Gates Passed
4 Quality Gates Passed

See analysis details in CodeScene

Quality Gate Profile: Clean Code Collective
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