fix: add root status endpoint

Return basic environment status at / so Hugging Face Space probes and browser visits do not show 404 while preserving OpenEnv API routes.

Made-with: Cursor

environment/server.py

@@ -22,6 +22,17 @@ app = create_app(
 )
 
 
+@app.get("/")
+def root():
+    return {
+        "name": "ContextCorruption-Env",
+        "status": "running",
+        "openenv_endpoints": ["/health", "/metadata", "/schema", "/reset", "/step", "/state"],
+        "model_endpoints": ["/model/status", "/model/infer"],
+        "docs": "/docs",
+    }
+
+
 @app.get("/model/status")
 def get_model_status():
     return model_status()