fix(wait-for-hydra): send debug echo to stderr in poll_github

The poll_github function echoes a "Querying: ..." debug line to stdout.
Since poll_wait captures its output via conclusion=$(poll_github), the
conclusion variable contains the debug line concatenated with the actual
gh api result — a multi-line string like "Querying: ...\nsuccess".

The case "$conclusion" in poll_wait never matches "success" because
the variable isn't a bare keyword — it's the debug text plus the result.
This causes the action to loop until timeout even when the check has
already passed.

Fix: redirect debug echo to stderr (>&2) so only the gh api result
is captured by the caller.

Author: angerman

wait-for-hydra/support/wait.sh

@@ -213,15 +213,15 @@ sse_wait() {
 
 poll_github() {
     if [ -n "$CHECK" ]; then
-        echo "Querying: gh api repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/check-runs --paginate --jq '...select(.name == \"$CHECK\")...'"
+        echo "Querying: gh api repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/check-runs --paginate --jq '...select(.name == \"$CHECK\")...'" >&2
         # Use tail -1 to handle paginated results that may concatenate
         # multiple values; take the last (most recent) non-empty line.
         gh api "repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/check-runs" \
             --paginate \
             --jq ".check_runs[] | select(.name == \"$CHECK\") | .conclusion" \
             | tail -1
     else
-        echo "Querying: gh api repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/status --paginate --jq '...select(.context == \"$STATUS\")...'"
+        echo "Querying: gh api repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/status --paginate --jq '...select(.context == \"$STATUS\")...'" >&2
         gh api "repos/$GITHUB_REPOSITORY/commits/$RELEVANT_SHA/status" \
             --paginate \
             --jq ".statuses[] | select(.context == \"$STATUS\") | .state" \