docker-compose: put Rust services behind 'rust' profile so Node services start independently

docker compose up -d          → starts Node services only (fast)
docker compose --profile rust up -d → starts everything including Rust (slow build)

products/docker-compose.yml

@@ -49,7 +49,11 @@ services:
 
   # --- dd0c Products ---
   # P1: LLM Cost Router (Rust — API server)
+  # NOTE: Rust services are behind the "rust" profile because they take 10+ min to compile.
+  # Start without Rust: docker compose up -d
+  # Start with Rust:    docker compose --profile rust up -d
   route-api:
+    profiles: ["rust"]
     build:
       context: ./01-llm-cost-router
       dockerfile: Dockerfile
@@ -68,6 +72,7 @@ services:
 
   # P1: LLM Cost Router (Rust — proxy)
   route-proxy:
+    profiles: ["rust"]
     build:
       context: ./01-llm-cost-router
       dockerfile: Dockerfile
@@ -84,6 +89,7 @@ services:
 
   # P1: LLM Cost Router (Rust — worker)
   route-worker:
+    profiles: ["rust"]
     build:
       context: ./01-llm-cost-router
       dockerfile: Dockerfile