llm(frank-archon): swap payload to the publisher's iq4r .rad, shape verbatim

Model swap on the radiance endpoint: MODEL_FILE moves from the in-house
qwen4exp-swift15-w4dn8-i8-hc8m.rad (116,416 MiB) to the engine author's
published qwen3.8-next-flash-fp8-iq4r-moe.rad (116,322 MiB, official
Qwen3.8-Flash-Next bf16 -> 4-bit non-uniform codebook experts + int8
trunk, card KL 0.0789 / top-1 92.85 % vs bf16). NO argument changed:
25600/5120 vram pair, 44928 host pool, fp8 KV, 3 x 200000, MTP depth 2,
wht6, MNBT 2048, froggeric v22.5 — the 2026-10-13 shape carries verbatim.

New fetch script scripts/download-frank-archon-iq4r.sh (hfget + exact
byte count 121,969,901,568 + LFS sha256, --verify-only default, ungated,
no token on the command line). Unit/serve/deployer lore re-keyed; the
seam pins the new payload id + sha256 and keeps the w4dn8 rollback
provenance. Homepage card points at the publisher repo.

Rollback: revert this commit (w4dn8 .rad stays on disk). The fp8-native
rad was deleted from dankserver 2026-10-15 (Frank's one-time rm, volume
for this payload); rebuild path documented.

scripts/frank-archon.service

@@ -1,9 +1,9 @@
 # frank-archon.service — radiance (StillDeadcode, Apache-2.0) endpoint
-# (OFFICIAL Qwen/Qwen3.8-Flash-Next-FP8 at NATIVE block-FP8 precision, the
-# rad-convert container qwen4exp-fp8-native.rad) on BOTH R9700s (TP=2,
-# wht6 wire), dankserver :7770. 2026-10-05 cutover from FreeToken (git tag
-# frank-archon-freetoken-pr587-20261005 is the pre-cutover state; the
-# retired unit/env/serve trio and Dockerfile are in that tag).
+# (the publisher's 4-bit-codebook container of the official
+# Qwen/Qwen3.8-Flash-Next, qwen3.8-next-flash-fp8-iq4r-moe.rad, fetched by
+# scripts/download-frank-archon-iq4r.sh) on BOTH R9700s (TP=2, wht6 wire),
+# dankserver :7770. 2026-10-15 payload swap from the in-house w4dn8 (the
+# swap commit is the revert; its .rad stays on disk).
 #
 # Same port, same served alias, same container identity as the unit name;
 # the harness models.yml id is unchanged. The serve script drives
@@ -19,7 +19,7 @@
 # unit grants LimitMEMLOCK=infinity to the dank process via PID1; the
 # engine still runs out of dank's rootless podman storage.
 [Unit]
-Description=frank-archon — radiance Qwen3.8-Flash-Next-FP8 (native) on 2x R9700 TP=2
+Description=frank-archon — radiance Qwen3.8-Flash-Next (publisher iq4r) on 2x R9700 TP=2
 After=network-online.target
 Wants=network-online.target
 # Never let the start-rate limiter give up after a crash loop (a failed LLM