fix: resolve openenv validate failure by adding uv.lock, openenv-core dependency, and server script entry point

pyproject.toml

@@ -13,7 +13,8 @@ dependencies = [
     "fastapi>=0.110.0",
     "uvicorn>=0.29.0",
     "pydantic>=2.6.0",
+    "openenv-core>=0.2.0",
 ]
 
 [project.scripts]
-serve = "server:app"
+server = "server:main"

server.py

@@ -78,5 +78,9 @@ def score(task: int = 1):
     return {"score": env.score(), "task": task}
 
 
-if __name__ == "__main__":
+def main():
     uvicorn.run(app, host="0.0.0.0", port=7860)
+
+
+if __name__ == "__main__":
+    main()