Add a new api configure_logging to allow dumping the requests (#2875)

python/sglang/srt/managers/io_struct.py

@@ -488,6 +488,13 @@ class ProfileReq(Enum):
     STOP_PROFILE = 2
 
 
+@dataclass
+class ConfigureLoggingReq:
+    log_requests: Optional[bool] = None
+    dump_requests_folder: Optional[str] = None
+    dump_requests_threshold: Optional[int] = None
+
+
 @dataclass
 class OpenSessionReqInput:
     capacity_of_str_len: int