feat(ai): semantic-search backfill + Ollama profile (#30)

docker-compose.yml

@@ -65,6 +65,8 @@ services:
       GoogleOAuth__ClientId: ${GOOGLE_CLIENT_ID:-}
       GoogleOAuth__ClientSecret: ${GOOGLE_CLIENT_SECRET:-}
       Ai__Mode: ${AI_MODE:-Disabled}
+      # Points at the compose 'ollama' service when the ai profile is up; harmless otherwise.
+      Ai__OllamaBaseUrl: ${OLLAMA_BASE_URL:-http://ollama:11434}
       # Dev mode shows the dev banner and caps the initial sync. Set DEV_MODE=true
       # and MAX_MESSAGES=1000 in deploy/.env to exercise it in this Docker setup.
       App__DevMode: ${DEV_MODE:-false}
@@ -90,6 +92,23 @@ services:
     ports:
       - "8081:80"
 
+  # Local AI (semantic search + assistants). Enable with:
+  #   docker compose --profile ai up -d && set AI_MODE=LocalOllama in deploy/.env
+  # First run: docker compose exec ollama ollama pull nomic-embed-text
+  # GPU (RTX 3080): uncomment the deploy block to pass the GPU through.
+  ollama:
+    image: ollama/ollama
+    profiles: ["ai"]
+    volumes:
+      - ollama:/root/.ollama
+    # deploy:
+    #   resources:
+    #     reservations:
+    #       devices:
+    #         - driver: nvidia
+    #           count: all
+    #           capabilities: [gpu]
+
   # Optional reverse proxy. Enable with: docker compose --profile proxy up
   nginx:
     image: nginx:alpine
@@ -105,3 +124,4 @@ services:
 volumes:
   pgdata:
   keys:
+  ollama: