Enhance substrate ingest limits and optimize simulator stream reuse

substrate/src/config.rs

@@ -22,6 +22,9 @@ pub struct QuicConfig {
     pub server_interface: String,
     pub server_cert: String,
     pub server_key: String,
+    pub t1_capacity: usize,
+    pub t2_capacity: usize,
+    pub t3_capacity: usize,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -41,6 +44,9 @@ impl Default for AppConfig {
                 server_interface: "0.0.0.0".to_string(),
                 server_cert: "certs/server.crt".to_string(),
                 server_key: "certs/server.key".to_string(),
+                t1_capacity: 1024,
+                t2_capacity: 512,
+                t3_capacity: 256,
             },
             simulation: SimulationConfig {
                 tick_rate_hz: 60,