frank-medium: swap ROCmFPX llama.cpp runtime for vllm-radiance MXFP4

Rootless Quadlet on dankserver serving
just1moremodel/Qwen3.8-27B-Uncensored-MXFP4-awq (the radiance stack's
designated alternate target; ships its fp8 MTP head, no rewrite step) with
the DFlash2-FP8 drafter at SPEC=7 on the 2x R9700s (TP=2, host network,
:7770, alias frank-medium unchanged).

- dankserver/frank-medium/: quadlet unit, container entrypoint (fork of
  serve-mxfp4.sh's patch block at pinned clone commit 97353293), healthcheck
- dispatcher retires the root llama.cpp unit, re-tags the registry image to
  the localhost alias, installs the quadlet, waits on /health
- planner maps dankserver/frank-medium/* to frank-medium; scripts-era
  mappings removed
- ROCmFPX-era env/serve/unit/download scripts staged in scripts/.AGENTTRASH
  with .rocmfpx suffix; seams updated (frank_medium_quadlet.bats new)

dankserver/frank-medium/frank-medium-healthcheck.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+"""frank-medium container healthcheck: vLLM /health must answer 200.
+
+Runs INSIDE the container. The vLLM /health endpoint only answers once the
+engine is up (weights loaded, cudagraphs captured), so a healthy container is
+a serving container, not merely a live process. The HealthCmd in the quadlet
+splits on spaces into an argv array (podman 5.x v1 generator), which is why
+this lives in a file rather than an inline python one-liner.
+"""
+import sys
+import urllib.request
+
+try:
+    with urllib.request.urlopen("http://127.0.0.1:7770/health", timeout=5) as r:
+        sys.exit(0 if r.status == 200 else 1)
+except Exception:
+    sys.exit(1)