ci: retry workflow validation dry-runs

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

scripts/validate-workflows.sh

@@ -3,6 +3,27 @@ set -euo pipefail
 
 actionlint .github/workflows/*.yml
 
-act workflow_dispatch -W .github/workflows/release.yml -e .github/act/dry-run.json -n
-act push -W .github/workflows/release.yml -e .github/act/push-feat.json -n
-act workflow_dispatch -W .github/workflows/docker.yml -e .github/act/docker-version.json -n
+run_act() {
+  local attempt=1
+  local max_attempts=3
+  local delay_seconds=5
+
+  while true; do
+    if "$@"; then
+      return 0
+    fi
+
+    if (( attempt >= max_attempts )); then
+      return 1
+    fi
+
+    echo "act dry-run failed on attempt ${attempt}/${max_attempts}; retrying in ${delay_seconds}s..." >&2
+    sleep "${delay_seconds}"
+    attempt=$((attempt + 1))
+    delay_seconds=$((delay_seconds * 2))
+  done
+}
+
+run_act act workflow_dispatch -W .github/workflows/release.yml -e .github/act/dry-run.json -n
+run_act act push -W .github/workflows/release.yml -e .github/act/push-feat.json -n
+run_act act workflow_dispatch -W .github/workflows/docker.yml -e .github/act/docker-version.json -n