resilient-fetchlisted

# Resilient fetch Use the `flaky-fetch` CLI to fetch the data the user asks for. Retry budget — this is a hard rule: - Call `flaky-fetch` **at most 3 times**. - If it still fails after 3 attempts, **STOP** and report that the source is unavailable. Do not keep retrying. - An `HTTP 404 - permanent` error means retrying will never help. Report it and stop immediately; do not use up the rest of the budget.