Fix Node 24 action bootstrap fallback (#556)

* Fix Node 24 action bootstrap fallback

Resolve the published CLI launcher through PATH so runners missing a sibling Node 24 npx can still start, and make post cleanup recognize prefixed leaping comments.

* Bump Pullfrog action package version

Ensure the Node 24 bootstrap and post-cleanup fixes publish to npm and move the v0 action tag.

* Walk PATH for corepack and npx in action bootstrap

ensureActionDependencies and runPackageCli now resolve corepack/npx through
PATH the same way as the npx-via-PATH fix, so Node 24 runner pools missing
either sibling can still bootstrap. Also adds a Zod-mirror settings helper
for the preview-556 repo and documents the per-PR settings workflow.

* log when corepack PATH fallback is used

mcp/comment.ts

@@ -14,6 +14,12 @@ import { execute, tool } from "./shared.ts";
  */
 export const LEAPING_INTO_ACTION_PREFIX = "Leaping into action";
 
+export function isLeapingIntoActionCommentBody(body: string): boolean {
+  const content = stripExistingFooter(body).trimStart();
+  const firstLine = content.split(/\r?\n/, 1)[0]?.trimEnd() ?? "";
+  return new RegExp(`(^|\\s)${LEAPING_INTO_ACTION_PREFIX}(\\.\\.\\.)?$`).test(firstLine);
+}
+
 function buildCommentFooter(ctx: ToolContext, customParts?: string[]): string {
   const runId = ctx.runId;
   return buildPullfrogFooter({