docs: otlp observability

[dianed-square]

This PR documents OpenTelemetry Protocol (OTLP) configuration support. Also changed to lowercase “goose” in touched files.

Documentation updates:

• documentation/docs/guides/environment-variables.md:
  • Add new “Observability” section and made Langfuse a subsection
  • Add “OpenTelemetry Protocol (OTLP)” subsection with OTEL_EXPORTER_OTLP_ENDPOINT and OTEL_EXPORTER_OTLP_TIMEOUT vars
• documentation/docs/guides/config-file.md:
  • Add otel_exporter_otlp_endpoint and otel_exporter_otlp_timeout
• documentation/docs/troubleshooting.md:
  • Add “Debugging and Diagnostics” section with links to logs and observability

Type of Change

• [ ] Feature
• [ ] Bug fix
• [ ] Refactor / Code quality
• [ ] Performance improvement
• [x] Documentation
• [ ] Tests
• [ ] Security fix
• [ ] Build / Release
• [ ] Other (specify below)

Testing

Manual testing - Verified OTLP export via env vars (Jaeger in Docker received traces). I was unable to verify with config.yaml keys but goose says it should work as described

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[github-actions[bot]]

PR Preview Action v1.6.0 :---: Preview removed because the pull request was closed. 2025-10-29 17:37 UTC