feat(nh3-ml1): LFM2.5-VL-3B (llama.cpp) + VibeVoice-ASR-Streaming-1.5B (audio.cpp) utility seats

For brokkr's dataset foundry (operator-approved 2026-09-26, relayed).
- stacks/lfm-vl-seat: llama.cpp server-cuda b11176 (digest-pinned), Q5_K_M +
  mmproj Q8_0, :8030; gateway alias lfm25-vl-3b (LiteLLM restarted, 36 s).
  Positive control exact; null control shows it describes a missing image.
- stacks/vibevoice-asr-seat: audio.cpp v0.8.2-audio8-perf-hotfix (the GGUF's
  own runtime, not vibevoice.cpp) on cuda 12.8 runtime + libgomp + libsoxr,
  sha256-pinned; :8031 direct. LibriSpeech WER 3/69, RTF 0.07-0.14; ~31 s
  cold first request.

stacks/lfm-vl-seat/README.md

@@ -0,0 +1,23 @@
+# lfm-vl-seat
+
+**LiquidAI LFM2.5-VL-3B**, a small vision-language model, on **nh3-ml1**, served
+by llama.cpp (`ghcr.io/ggml-org/llama.cpp` server-cuda, build b11176, pinned by
+digest) on `:8030`. A utility seat for brokkr's dataset foundry (image
+understanding). Operator-approved 2026-09-26, relayed by brokkr-smithy-dev.
+
+| | |
+|---|---|
+| direct | `http://10.100.50.80:8030/v1/chat/completions`, model `lfm25-vl-3b` |
+| gateway | `lfm25-vl-3b` (ana-docker:4000, `hosted_vllm/`, `supports_vision`) |
+| files | `LFM2.5-VL-3B-Q5_K_M.gguf` + **`mmproj-LFM2.5-VL-3B-Q8_0.gguf` (required for images)** from `LiquidAI/LFM2.5-VL-3B-GGUF` @ `6f730e9a2c45` |
+| VRAM | ~2.9 GB (2 slots × 8k ctx) |
+
+**Checks, 2026-09-26.**
+- Positive control: a synthetic image (red square, blue circle, the text
+  "NH3 42") was described exactly at T=0, both direct and through the gateway.
+- Speed: prefill ~800 tok/s, decode ~92 tok/s.
+- ⚠ **Null control: with no image attached it confidently describes one anyway**
+  ("a solid black background"). Callers must make sure the image actually went in.
+
+Not wired yet: `LiquidAI/LFM2.5-VL-3B-DSpark-GGUF`, a speculative-decoding
+drafter (brokkr's "optional later").