fix: ollama docker_owned=True; finetune gets own profile to avoid build on start

- preflight: ollama was incorrectly marked docker_owned=False — Docker does
  define an ollama service, so external detection now correctly disables it
  via compose.override.yml when host Ollama is already running
- compose.yml: finetune moves from [cpu,single-gpu,dual-gpu] profiles to
  [finetune] profile so it is never built during 'make start' (pytorch/cuda
  base is 3.7GB+ and unnecessary for the UI)
- compose.yml: remove depends_on ollama from finetune — it reaches Ollama
  via OLLAMA_URL env var which works whether Ollama is Docker or host
- Makefile: finetune target uses --profile finetune + compose.gpu.yml overlay

Makefile

@@ -55,7 +55,7 @@ prepare-training: ## Scan docs_dir for cover letters and build training JSONL
 
 finetune:       ## Fine-tune your personal cover letter model (run prepare-training first)
 	@echo "Starting fine-tune (30-90 min on GPU, much longer on CPU)..."
-	$(COMPOSE) $(COMPOSE_FILES) --profile $(PROFILE) run --rm finetune
+	$(COMPOSE) $(COMPOSE_FILES) -f compose.gpu.yml --profile finetune run --rm finetune
 
 clean:          ## Remove containers, images, and data volumes (DESTRUCTIVE)
 	@echo "WARNING: This will delete all Peregrine containers and data."

compose.yml

@@ -92,8 +92,5 @@ services:
       - OLLAMA_URL=http://ollama:11434
       - OLLAMA_MODELS_MOUNT=/ollama-models
       - OLLAMA_MODELS_OLLAMA_PATH=/root/.ollama
-    depends_on:
-      ollama:
-        condition: service_started
-    profiles: [cpu, single-gpu, dual-gpu]
+    profiles: [finetune]
     restart: "no"

scripts/preflight.py

@@ -48,7 +48,7 @@ _SERVICES: dict[str, tuple[str, int, str, bool, bool]] = {
     "searxng":   ("searxng_port",   8888, "SEARXNG_PORT",   True,  True),
     "vllm":      ("vllm_port",      8000, "VLLM_PORT",      True,  True),
     "vision":    ("vision_port",    8002, "VISION_PORT",    True,  True),
-    "ollama":    ("ollama_port",  11434,  "OLLAMA_PORT",    False, True),
+    "ollama":    ("ollama_port",  11434,  "OLLAMA_PORT",    True,  True),
 }
 
 # LLM yaml backend keys → url suffix, keyed by service name