fix: imports and model names

app.py

@@ -1,11 +1,9 @@
 """DevOps Arena FastAPI server."""
-import sys, os
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
 
 from fastapi import FastAPI
 from pydantic import BaseModel
-from server.arena_environment import ArenaEnvironment
-from models import AgentAction
+from arena_environment import ArenaEnvironment
+from models import DevAction
 
 app = FastAPI(title="DevOps Arena Environment API")
 env = ArenaEnvironment()
@@ -24,7 +22,7 @@ def reset():
 
 @app.post("/step")
 def step(req: StepRequest):
-    action = AgentAction(**req.action)
+    action = DevAction(**req.action)
     obs = env.step(action)
     return {"observation": obs.model_dump(), "reward": obs.reward, "done": obs.done}
 

arena_environment.py

@@ -2,7 +2,7 @@
 import os, shutil, subprocess, tempfile, json
 from models import DevAction, DevObservation, EpisodeState
 from tasks import TASKS
-from server.verifier import verify_episode
+from verifier import verify_episode
 
 class ArenaEnvironment:
     def __init__(self):