[router] update generate spec to align with sgl io struct (#11591)

sgl-router/benches/request_processing.rs

@@ -28,15 +28,38 @@ fn get_bootstrap_info(worker: &BasicWorker) -> (String, Option<u16>) {
 fn default_generate_request() -> GenerateRequest {
     GenerateRequest {
         text: None,
-        prompt: None,
         input_ids: None,
-        stream: false,
+        input_embeds: None,
+        image_data: None,
+        video_data: None,
+        audio_data: None,
         sampling_params: None,
-        return_logprob: false,
-        // SGLang Extensions
-        lora_path: None,
-        session_params: None,
+        return_logprob: None,
+        logprob_start_len: None,
+        top_logprobs_num: None,
+        token_ids_logprob: None,
+        return_text_in_logprobs: false,
+        stream: false,
+        log_metrics: true,
         return_hidden_states: false,
+        modalities: None,
+        session_params: None,
+        lora_path: None,
+        lora_id: None,
+        custom_logit_processor: None,
+        bootstrap_host: None,
+        bootstrap_port: None,
+        bootstrap_room: None,
+        bootstrap_pair_key: None,
+        data_parallel_rank: None,
+        background: false,
+        conversation_id: None,
+        priority: None,
+        extra_key: None,
+        no_logs: false,
+        custom_labels: None,
+        return_bytes: false,
+        return_entropy: false,
         rid: None,
     }
 }
@@ -101,6 +124,7 @@ fn create_sample_generate_request() -> GenerateRequest {
     GenerateRequest {
         text: Some("Write a story about artificial intelligence".to_string()),
         sampling_params: Some(SamplingParams {
+            max_new_tokens: Some(100),
             temperature: Some(0.8),
             top_p: Some(0.9),
             top_k: Some(50),