Support server based rollout in Verlengine (#4848)

Co-authored-by: Jin Pan <jpan236@wisc.edu>
Co-authored-by: Chayenne <zhaochen20@outlook.com>
Co-authored-by: Jinn <47354855+jhinpan@users.noreply.github.com>

python/sglang/srt/entrypoints/engine.py

@@ -38,6 +38,7 @@ import torch
 import uvloop
 
 from sglang.srt.code_completion_parser import load_completion_template_for_openai_api
+from sglang.srt.entrypoints.EngineBase import EngineBase
 from sglang.srt.managers.data_parallel_controller import (
     run_data_parallel_controller_process,
 )
@@ -78,7 +79,7 @@ logger = logging.getLogger(__name__)
 asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
 
 
-class Engine:
+class Engine(EngineBase):
     """
     The entry point to the inference engine.