chore(dankclaw): reclaim 510G of retired payloads; fix a stale fallback

The disk was at 93% with 137G free. Nine retired payloads are now moved
to ~/.AGENTTRASH/20260928-retired-models/ with a MANIFEST.md giving a
restore command per item — moved, not deleted, and nothing is freed until
the purge is approved. Every one maps to a runtime already retired in the
runbook index.

Only the .gguf was taken from Qwen3.8-27B-UD-Q8_K_XL/: the live
frank-large DFlash2 drafter lives in that directory and stays put. The
manifest warns against restoring the directory wholesale.

Kept: checkpoints/ (23G) — unreferenced by the repo, but ComfyUI is live
and its workflows were not searched, so it is not confirmed dead. Also
logs/, because x4e-run.log is a SPARSE file (3.3G apparent, 4K real) and
frees nothing.

The reference check caught a live bug: serve-frank-small.sh's fallback
MODEL_DIR still pointed at the retired GSQ-RCO payload frank-small served
on 2026-09-16/17. frank-small.env has always overridden it, so the drift
was invisible — but a missing or unreadable env file would have turned a
config problem into a "missing asset" naming a model that is no longer
there. Repointed at Gemma4-12B-QAT/, which the env file already sets.

Not taken, by request: podman images (279G reclaimable, 95%) and the
uv+pip caches (73G). Together 352G of regenerable garbage, larger than
what was reclaimed here.

The 29.3G payload rollback target went with the rest, so the payload-only
rollback is now a re-fetch first; the runbook and AGENTS.md say so.

serverAppConfigs-docs/log.md

@@ -2,6 +2,46 @@
 
 
 ## 2026-09-28
+- **Dankclaw model cleanup** (disk was at 93%, 137 G free). Frank asked to
+  clean up old models. **510 G staged** to
+  `~/.AGENTTRASH/20260928-retired-models/` — moved, NOT deleted, with a
+  `MANIFEST.md` giving a restore command per item. **Nothing is freed until
+  the purge is approved**; that is the point of the trash policy, and the
+  number to know before expecting the disk to move.
+  - Staged: CIRU Orca 128 G, halogen 123 G, unsloth Flash-Next IQ4_XS 91 G,
+    mradermacher IQ4_XS 91 G, unsloth 27B 29.3 G, Kairic Edge 27 G,
+    ISTA-DASLab GSQ-RCO 13 G, vLLM Gemma4 w4a16 9.6 G, vLLM Gemma4 drafter
+    838 M. Every one maps to a runtime already retired in the runbook index.
+  - **The 29.3 G rollback target went with them**, by Frank's decision. The
+    payload-only rollback is now a re-fetch first; both the runbook and
+    AGENTS.md say so. **The DFlash2 drafter was NOT reclaimed** — only the
+    `.gguf` was taken out of that directory, because the live frank-large
+    drafter lives in it. The manifest warns against restoring the directory
+    wholesale.
+  - **Kept deliberately:** `checkpoints/` 23 G. It is unreferenced by the
+    repo, but ComfyUI is live and its workflows were not searched — not
+    confirmed dead, so not taken. `logs/x4e-run.log` also stays: it is a
+    **sparse** file, 3.3 G apparent but 4 K real, so removing it frees
+    nothing.
+  - **A live reference check came first, and it earned its keep.**
+    `serve-frank-small.sh`'s *fallback* `MODEL_DIR` still pointed at the
+    retired GSQ-RCO payload frank-small served on 2026-09-16/17. The env
+    file has always overridden it, so the drift was invisible — but a
+    missing or unreadable env file would have turned a config problem into a
+    "missing asset" naming a model that no longer exists. Repointed at
+    `Gemma4-12B-QAT/`, which is what the env file already sets. Every other
+    hit was a comment, a retired fetch script's destination, or
+    `retire_halogen_large_quadlet` (which moves a *quadlet*, not a model).
+  - **Not taken, by Frank's decision — scope was models only:** podman
+    images (**279 G reclaimable, 95%**; 170 images, 23 active) and the
+    uv+pip caches (**73 G**). Together that is 352 G of regenerable garbage
+    larger than the models reclaimed, and it is the obvious next move.
+  - Pre-existing: **118 G of trash from 2026-09-21** was already staged
+    (`20260921-frank-large-assembled` 88 G, `-redownload` 30 G) and never
+    purged. Total now staged on this host: **627 G**.
+  - Verified after the moves: frank-large and frank-small both `active`,
+    both `/health` 200, and all three live assets (Swift target, DFlash2
+    drafter, Gemma4 target) still present.
 - **frank-large payload swapped to Swift-1.5 (uncensored)** (production
   change, Dankclaw). Frank asked whether the UD Q8 of
   `ajgazin/Swift-1.5-Qwen3.8-27B-Uncensored-Dynamic-MTP-GGUF` would load on