Rename to gpu-turnstile; swap port roles

The proxy now listens on the standard service ports (Ollama :11434,
ComfyUI :8188) and the actual services move one port up (:11435, :8189).
Metric prefix is now gpu_turnstile_.

README.md

@@ -1,15 +1,19 @@
-# gpulock
+# gpu-turnstile
 
 GPU arbitration proxy for Ollama + ComfyUI. One consumer GPU is shared by an
-LLM server (Ollama) and an image generator (ComfyUI); gpulock sits in front of
-both and guarantees the GPU is always in exactly one of three states: `idle`,
-`llm` (N ≥ 1 Ollama requests in flight), or `image` (exactly one ComfyUI job,
-Ollama models unloaded). See [SPEC.md](SPEC.md) for the full design.
+LLM server (Ollama) and an image generator (ComfyUI); gpu-turnstile sits in
+front of both and guarantees the GPU is always in exactly one of three states:
+`idle`, `llm` (N ≥ 1 Ollama requests in flight), or `image` (exactly one
+ComfyUI job, Ollama models unloaded). See [SPEC.md](SPEC.md) for the full
+design.
+
+gpu-turnstile listens on the ports the services normally use; the actual
+services run one port higher (Ollama on 11435, ComfyUI on 8189).
 
 ```
-LiteLLM / Open WebUI ──► :11435 ─┐                     ┌─► Ollama  :11434
-                                 ├── gpulock (1 lock) ──┤
-Open WebUI / n8n ────► :8189  ───┘                     └─► ComfyUI :8188
+LiteLLM / Open WebUI ──► :11434 ─┐                           ┌─► Ollama  :11435
+                                 ├── gpu-turnstile (1 lock) ──┤
+Open WebUI / n8n ────► :8188  ───┘                           └─► ComfyUI :8189
 ```
 
 - LLM endpoints (`/api/generate`, `/api/chat`, `/api/embed`, `/v1/*`) take the
@@ -29,10 +33,10 @@ startup.
 
 | Var | Default | Meaning |
 |---|---|---|
-| `LISTEN_OLLAMA` | `:11435` | Ollama-facing listener |
-| `LISTEN_COMFY` | `:8189` | ComfyUI-facing listener |
-| `OLLAMA_URL` | `http://127.0.0.1:11434` | Ollama upstream |
-| `COMFY_URL` | `http://127.0.0.1:8188` | ComfyUI upstream |
+| `LISTEN_OLLAMA` | `:11434` | Ollama-facing listener |
+| `LISTEN_COMFY` | `:8188` | ComfyUI-facing listener |
+| `OLLAMA_URL` | `http://127.0.0.1:11435` | Ollama upstream |
+| `COMFY_URL` | `http://127.0.0.1:8189` | ComfyUI upstream |
 | `UNLOAD_TIMEOUT` | `60s` | Wait for Ollama to unload before an image job |
 | `JOB_TIMEOUT` | `15m` | Wait for a ComfyUI job to finish |
 | `LLM_WAIT_TIMEOUT` | `10m` | Max lock wait for an LLM request before 503 |
@@ -43,29 +47,29 @@ startup.
 ## Observability
 
 - `GET /healthz` (both listeners): `{"state":"idle|llm|image","llm_inflight":N,"image_pending":B}`
-- `GET /metrics` (Ollama listener): Prometheus text format — `gpulock_state`,
-  `gpulock_llm_inflight`, `gpulock_image_pending`, `gpulock_image_jobs_total`,
-  `gpulock_lock_wait_seconds` (histogram, `kind="llm|image"`),
-  `gpulock_unload_seconds`.
+- `GET /metrics` (Ollama listener): Prometheus text format — `gpu_turnstile_state`,
+  `gpu_turnstile_llm_inflight`, `gpu_turnstile_image_pending`,
+  `gpu_turnstile_image_jobs_total`, `gpu_turnstile_lock_wait_seconds`
+  (histogram, `kind="llm|image"`), `gpu_turnstile_unload_seconds`.
 
 ## Build and run
 
 ```sh
-go build ./cmd/gpulock
-./gpulock
+go build ./cmd/gpu-turnstile
+./gpu-turnstile
 ```
 
 ```sh
-docker build -t gpulock .
-docker run --rm -p 11435:11435 -p 8189:8189 \
-  -e OLLAMA_URL=http://<workstation-ip>:11434 \
-  -e COMFY_URL=http://<workstation-ip>:8188 \
-  gpulock
+docker build -t gpu-turnstile .
+docker run --rm -p 11434:11434 -p 8188:8188 \
+  -e OLLAMA_URL=http://<workstation-ip>:11435 \
+  -e COMFY_URL=http://<workstation-ip>:8189 \
+  gpu-turnstile
 ```
 
 Releases are built by Gitea Actions (`.gitea/workflows/ci.yml`): pushes run
 `go vet` and `go test -race` and publish
-`git.rambossek.at/<owner>/gpulock:sha-<short>`; `main` additionally gets
+`git.rambossek.at/<owner>/gpu-turnstile:sha-<short>`; `main` additionally gets
 `:latest`, and a git tag `vX.Y.Z` produces the versioned image.
 
 ## Development
@@ -78,7 +82,7 @@ go test -race ./...
 Stdlib only, Go 1.23+. Layout:
 
 ```
-cmd/gpulock/main.go        wiring, config, listeners
+cmd/gpu-turnstile/main.go  wiring, config, listeners
 internal/lock/             two-mode lock (LLM readers / image writer, FIFO)
 internal/ollama/           ps / unload / warm client
 internal/comfy/            history poll / free client