Suggested test: copilot/user-rate-limit-frontmatter

## Motivation

Link to the gh-aw PR: github/gh-aw#56328 — "Fix user-rate-limit alias schema and event fallback"

`user-rate-limit` now accepts `max-runs-per-window`, `max-runs`, or `max` (deprecated aliases), rejects ambiguous configs specifying more than one max field, and falls back to all supported programmatic events when `events` is omitted and no trigger can be inferred. No existing test file references `user-rate-limit` frontmatter at all.

## Proposed test

- **Workflow file**: `test-copilot-user-rate-limit.md`
- **Trigger**: `workflow_dispatch`
- **Engine**: copilot
- **Safe output**: `create-issue`
- **Variant**: standard

## Minimal test prompt sketch

Add a `user-rate-limit: { max-runs-per-window: 5, window: 60 }` block to frontmatter, compile, and have the agent create a simple confirmation issue. Primarily a compile-time/schema smoke test — the rate limit itself isn't triggered in a single dispatch run, but this confirms the field compiles and doesn't regress.

## New fixtures or secrets needed

None.

## Notes

Consider a second minimal case using the deprecated `max-runs` alias to confirm it still compiles (schema now permits it), though a single test covering the canonical field is a reasonable first step. No existing coverage exists for this frontmatter field.

> Generated by [🔍 Suggest New E2E Tests](https://github.com/githubnext/gh-aw-test/actions/runs/33170338931) · copilot · auto · 22.6 AIC · ⌖ 3.81 AIC · ⊞ 8.8K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-test+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-test%2Fsuggest-new-e2e-tests%22&type=issues)

Create test-copilot-user-rate-limit.md using the specified workflow_dispatch trigger, copilot engine, standard variant, and create-issue output. Add the canonical user-rate-limit frontmatter block, compile the workflow, and confirm the agent creates the simple confirmation issue without requiring new fixtures or secrets.

Written by the indexing model from the issue text.