fix(ci): emit ::error to stdout so GitHub Actions surfaces the annotation

GitHub Actions only processes workflow commands (::error, ::warning,
etc.) when they appear on stdout. The previous code wrote the ::error
line inside a {...} >&2 block, sending it to stderr — the job still
exited 1, but the red annotation linking back to the failing PR title
never appeared in the Actions UI. Move the ::error to stdout and keep
the long-form details on stderr.

Caught by Greptile review on the sgp-typescript PR; applied to all 4
repos for consistency since the same pattern existed in each.

Author: declan-scale

.github/workflows/lint-pr.yaml

@@ -28,8 +28,11 @@ jobs:
             exit 0
           fi
 
+          # The ::error workflow command must be written to stdout for GitHub Actions
+          # to pick it up as an annotation. The supplementary detail goes to stderr so
+          # it shows up in the log but not as an annotation.
+          echo "::error title=Invalid PR title::PR title must follow Conventional Commits format. Got: $PR_TITLE"
           {
-            echo "::error title=Invalid PR title::PR title must follow Conventional Commits format."
             echo "  Got:      $PR_TITLE"
             echo "  Expected: <type>(<optional-scope>)(!): <subject>"
             echo "  Types:    feat, fix, docs, style, refactor, test, chore, ci, build, perf, revert"