deploy-local fails in "Determine version comment" when the caller uses deploy-local directly

Symptom

Any workflow that uses plengauer/opentelemetry-github/actions/instrument/deploy-local@<sha> directly (rather than going through .../instrument/deploy@<sha>) fails at the "Determine version comment" step of the composite action with a bare Process completed with exit code 1, with no error message.

Example: https://github.com/plengauer/Thoth/actions/runs/33862557226/job/100990074429 (Recompile Agentic Workflows in plengauer/Thoth).

Root cause

actions/instrument/deploy-local/action.yml, step determine-instrumentation-version-comment:

comment="$(grep -E '/actions/instrument/deploy@' "${{ steps.find-self.outputs.path }}" | sed -n 's/.*# *//p' | head -n 1)"

The pattern is anchored on deploy@, so it does not match a deploy-local@... reference. grep then exits 1. The composite action's shell is bash --noprofile --norc -e -o pipefail, so under set -e + pipefail the failing pipeline inside the command substitution aborts the step.

This is inconsistent with the two sibling steps, which both use a deploy* glob and therefore do match deploy-local:

• determine-repository: select(.uses == "*/actions/instrument/deploy*")
• determine-instrumentation-version: select(.uses == "<repo>/actions/instrument/deploy*")

Callers of deploy are unaffected, because deploy invokes deploy-local via the local ./.deploy-otel-local symlink while the caller's workflow file still literally contains /actions/instrument/deploy@<sha>.

Confirmation via traces

The OTel trace for the run (trace.id = 8fee1eb891c5b9418dd1e2dfabb073b2) shows the failure chain unambiguously:

The sibling sed and head -n 1 spans in the same pipeline completed successfully — only grep errored.

Proposed fix

Broaden the pattern to cover deploy-local (and any future deploy* variant) and make "no version comment present" a non-fatal outcome, since the comment is optional by design (the step already guards the output with [ -z "$comment" ] ||):

comment="$(grep -E '/actions/instrument/deploy[^@[:space:]]*@' "${{ steps.find-self.outputs.path }}" | sed -n 's/.*# *//p' | head -n 1 || true)"

The || true additionally hardens the step against a workflow that legitimately carries no # vX.Y.Z annotation at all, which would fail the same way today.