Ask Bjørn Hansen c6230be91e feat(metrics): add OTLP metrics support with centralized config
- Create new metrics/ package for OpenTelemetry-native metrics with OTLP export
- Refactor OTLP configuration to internal/tracerconfig/ to eliminate code duplication
- Add consistent retry configuration across all HTTP OTLP exporters
- Add configuration validation and improved error messages
- Include test coverage for all new functionality
- Make OpenTelemetry metrics dependencies explicit in go.mod

Designed for new applications requiring structured metrics export to
observability backends via OTLP protocol.
2025-08-02 09:29:27 -07:00
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