feat(app): add lifespan hook — creates RedTeamEnvironment on startup

server/app.py

@@ -1,10 +1,22 @@
+from contextlib import asynccontextmanager
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
+from server.environment import RedTeamEnvironment
+from server.config import get_settings
+
+env: RedTeamEnvironment = None
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    global env
+    settings = get_settings()
+    env = RedTeamEnvironment(max_turns=settings.max_turns)
+    yield
 
 app = FastAPI(
     title       = "RedTeamOS",
-    description = "AI Red-Teaming Environment for Safety Research",
     version     = "0.1.0",
+    lifespan    = lifespan,
 )
 
 app.add_middleware(