The 1GB suite downloads a 1GB fixture from Hetzner and uploads it to the
live deployment. Bun's Response-body write hangs against this source, so
the suite burned the full hook timeout on every routine run. Now:
- skipped by default (opt-in via RUN_LARGE_E2E=1)
- pre-flight Range probe (8s AbortSignal) fails fast when source is down
- 10min hook timeout retained for when the suite is actually opted in