configuration support for optional LLM extraction

src/repo_registry/web_api/app.py

@@ -7,6 +7,7 @@ from fastapi import Depends, FastAPI, HTTPException
 from pydantic import BaseModel, Field
 
 from repo_registry.core.service import RegistryService
+from repo_registry.llm_extraction import LLMCandidateExtractor, create_llm_connect_adapter
 from repo_registry.repo_ingestion.git import GitIngestionService
 from repo_registry.storage.sqlite import NotFoundError, RegistryStore
 
@@ -14,6 +15,8 @@ from repo_registry.storage.sqlite import NotFoundError, RegistryStore
 class Settings(BaseModel):
     database_path: str = Field(default="var/repo-registry.sqlite3")
     checkout_root: str = Field(default="var/checkouts")
+    llm_provider: str | None = Field(default=None)
+    llm_model: str | None = Field(default=None)
 
 
 def get_settings() -> Settings:
@@ -25,7 +28,18 @@ def get_service(settings: Settings = Depends(get_settings)) -> RegistryService:
     database_path.parent.mkdir(parents=True, exist_ok=True)
     store = RegistryStore(database_path)
     store.initialize()
-    return RegistryService(store, ingestion=GitIngestionService(settings.checkout_root))
+    llm_extractor = None
+    if settings.llm_provider:
+        adapter = create_llm_connect_adapter(
+            settings.llm_provider,
+            model=settings.llm_model,
+        )
+        llm_extractor = LLMCandidateExtractor(adapter)
+    return RegistryService(
+        store,
+        ingestion=GitIngestionService(settings.checkout_root),
+        llm_extractor=llm_extractor,
+    )
 
 
 class RepositoryCreate(BaseModel):