Logflare / logflare / 14a983fce550d5503aa0f84f5da609a1619641ac-PR-3595

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Pull #3595

github

feat(telemetry): emit build commit SHA as OTel resource attribute

Surface the build's git commit SHA as a `service.commit` OTel resource
attribute so it lands in BigQuery as `resource._service_commit`. The
`VERSION`-derived `service.version` is bumped only at release time, so it
can't identify which commit the continuously-deployed staging `main`
cluster is running; the SHA gives per-build identity there.

- lib/telemetry.ex: add `commit: System.get_env("LOGFLARE_COMMIT_SHA")` to
  the metrics exporter resource. Unset -> `nil` -> serialized as "" (the
  exporter's is_atom clause), no crash.
- Dockerfile: ARG COMMIT_SHA -> ENV LOGFLARE_COMMIT_SHA in the runner stage.
- docker-ci: pass the already-computed short_sha as the COMMIT_SHA build-arg.

Cloud Build's secret_setup.Dockerfile is FROM the app image and inherits the
ENV; versioned/prod images are retags of the same dev image, so the SHA
propagates to all clusters without Cloud Build changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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