memory: breeze stays put; TTS-stack move to fv-ml1 parked at id 75

Operator ruling: leave breeze-tts on irv-ml1 and park moving it, bragi and
tts-gateway to fv-ml1 until the embedder, reranker and reward seats are evacuated.

Parked as move-the-tts-stack-breeze-tts-bragi-tts-gateway (id 75) with the trigger,
the footprints and the migration gotchas, so it resurfaces with everything needed
rather than as a bare line.

Two things worth having recorded against the trigger. All three services move as a
set because only breeze is GPU-resident at ~10.3 GiB and growing, while bragi and
tts-gateway are CPU-only proxies - co-location with the gateway is the entire reason
not to move breeze alone, since that is what puts a cross-site hop on every TTS call.

And the trigger as stated names gpu0, but vllm-embed, vllm-rerank-a3 and vllm-reward
are all pinned to GPU 1. GPU 1 is the constrained card at 0.975 committed with
4,336 MiB free, while GPU 0 has 11,982 MiB free and carries the live chat path, so
evacuating those three relieves GPU 1 rather than GPU 0. Recorded as a
confirm-before-executing rather than silently corrected, since it changes where the
TTS stack would land.

Also notes that bragi and tts-gateway reach each other by name only through
extra_hosts pins, because containers on irv-ml1 cannot resolve nh3.internal - those
pins travel with them and need re-pointing at the new host.

persistent-memory.md

@@ -133,7 +133,7 @@ _As of 2026-09-15 ~09:30 PT._
 
 ## Recent decisions
 
-- `[2026-09-15]` **breeze-tts sizing / fv-ml1 GPU 0 placement — RECOMMEND NOT MOVING IT.** ~**10.3 GiB** measured under load at 53 min uptime, **up from 9.2 GiB** shortly after warm-up (it grows; n=2, plateau unmeasured) — so GPU 0's 11,982 MiB free is a **1.7 GB margin and shrinking**, on the live chat serving path. ⚠ Two measurement traps: it reports **nothing at idle on the wrong card** (`BREEZE_GPU_DEVICES=0` = the **3090**, not the A6000), and an early reading understates it. ⭐ The real objection is **topology**: `tts-gateway` is on irv-ml1 and reaches it same-box, so moving breeze alone adds a cross-site hop to every TTS call against a 478 ms first-sample budget. GPU 3 would fit it but spends the reserve. → `persistent-memory.d/2026-09-15-breeze-placement-sizing.md`
+- `[2026-09-15]` **breeze-tts stays on irv-ml1; the TTS-stack move to fv-ml1 is PARKED (park id 75, `move-the-tts-stack-breeze-tts-bragi-tts-gateway`), triggered on evacuating embed/rerank/reward.** ⚠ Trigger as stated says "gpu0" but those three are on **GPU 1** (~0.16 util, ~15.7 GB; GPU 1 is the tight card at 0.975 / 4,336 MiB free) — confirm which he meant before executing. All three services move together because only `breeze-tts` is GPU-resident (~10.3 GiB, **growing**) while `bragi` and `tts-gateway` are CPU proxies, and co-location is what avoids a cross-site hop per TTS call. **breeze-tts sizing — original recommendation NOT to move it.** ~**10.3 GiB** measured under load at 53 min uptime, **up from 9.2 GiB** shortly after warm-up (it grows; n=2, plateau unmeasured) — so GPU 0's 11,982 MiB free is a **1.7 GB margin and shrinking**, on the live chat serving path. ⚠ Two measurement traps: it reports **nothing at idle on the wrong card** (`BREEZE_GPU_DEVICES=0` = the **3090**, not the A6000), and an early reading understates it. ⭐ The real objection is **topology**: `tts-gateway` is on irv-ml1 and reaches it same-box, so moving breeze alone adds a cross-site hop to every TTS call against a 478 ms first-sample budget. GPU 3 would fit it but spends the reserve. → `persistent-memory.d/2026-09-15-breeze-placement-sizing.md`
 
 - `[2026-09-15]` **Parakeet STT live on fv-ml1 GPU 0, behind LiteLLM `ext-stt` / `whisper-1`.** ⚠ **Placed on GPU 3 first, which was wrong — operator caught it.** A ~800 MiB seat should ride the card with the most uncommitted headroom (GPU 0, util 0.88, ~13 GB spare), not put the first fingerprint on the one pristine 96 GB card: vLLM sizes KV cache against TOTAL VRAM, so any tenant on an empty card eats a future full-size seat's profiling margin (flash-next needs 93 of 96 GiB). **GPU 3 is now a deliberate reserve at 2 MiB.** Retargeted the existing `stacks/parakeet/` (sherpa-onnx + our own FastAPI wrapper) from irv-ml1; v3 int8, 25 languages. ⚠ **ORT's CUDA EP compiles kernels lazily and the first decode on sm_120 took 45.7 s** — every later call ~0.5 s; a startup warmup in `app.py` now absorbs it, so the first real request is 0.65 s instead of a 45 s hang that no client would wait through. GPU use was **verified by a process on GPU 3 (922 MiB), not by the `provider=cuda` log line**, because ORT falls back to CPU silently and still returns correct text. Silence → `""` (null control), known sentence → near-exact (positive control). → `persistent-memory.d/2026-09-15-parakeet-stt-fv-ml1.md`