frank-primary: add FP8 payload manifest + fetch wrapper

scripts/manifests/qwen3.8-flash-next-fp8.manifest: 144 entries (131
safetensors shards + aux) with Hub LFS sha256s for
Qwen/Qwen3.8-Flash-Next-FP8. download-frank-primary-fp8.sh wraps
hf-fetch.sh: idempotent fetch, full sha256 re-verify of an on-disk
payload (verified live on dankserver: all 144 files match, ~10 min).

Part of the frank-primary vLLM cutover prep; the serve trio itself
lands with the image deploy.

scripts/download-frank-primary-fp8.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# download-frank-primary-fp8.sh — fetch/verify the Qwen3.8-Flash-Next-FP8
+# payload (131 safetensors shards, 172.78 GiB total, plus aux files) for the
+# vLLM frank-primary deployment on dankserver.
+#
+#   bash scripts/download-frank-primary-fp8.sh [dest_dir]
+#
+# The manifest (scripts/manifests/qwen3.8-flash-next-fp8.manifest) carries
+# per-file sizes + LFS sha256s from the Hub; hf-fetch.sh is idempotent — an
+# interrupted re-run fetches only what is missing or corrupt, and a complete
+# on-disk payload is re-verified (full sha256 pass) with zero downloads.
+# The repo is public; no HF_TOKEN required.
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+dest="${1:-/home/dank/models/Qwen3.8-Flash-Next-FP8}"
+
+exec bash "$REPO_ROOT/scripts/hf-fetch.sh" "$dest" \
+    "$REPO_ROOT/scripts/manifests/qwen3.8-flash-next-fp8.manifest" \
+    Qwen/Qwen3.8-Flash-Next-FP8