fix: add micro-throttle for Linux performance parity

Linux runs too fast compared to Windows/Wine, causing vehicle queue
backup (~44% completion vs 95% on Windows). Adding microsecond delays
via LockSupport.parkNanos() achieves 92% completion.

- 50μs delay in SocketConnection send/receive
- 100μs delay in CoordinatorProcess vehicle generation

main/src/main/java/sd/coordinator/CoordinatorProcess.java

@@ -3,6 +3,7 @@ package sd.coordinator;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.locks.LockSupport;
 
 import sd.config.SimulationConfig;
 import sd.dashboard.DashboardStatistics;
@@ -375,6 +376,7 @@ public class CoordinatorProcess {
 
         String entryIntersection = vehicle.getRoute().get(0);
         sendVehicleToIntersection(vehicle, entryIntersection);
+        LockSupport.parkNanos(100000); // 100us
     }
 
     /**

main/src/main/java/sd/protocol/SocketConnection.java

@@ -11,6 +11,7 @@ import java.net.Socket;
 import java.net.SocketTimeoutException;
 import java.net.UnknownHostException;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.LockSupport;
 
 import sd.serialization.MessageSerializer;
 import sd.serialization.SerializationException;
@@ -167,7 +168,8 @@ public class SocketConnection implements Closeable {
             DataOutputStream dataOut = new DataOutputStream(outputStream);
             dataOut.writeInt(data.length);
             dataOut.write(data);
-            dataOut.flush(); // Force transmission immediately
+            dataOut.flush();
+            LockSupport.parkNanos(50000); // 50us
             
         } catch (SerializationException e) {
             throw new IOException("Failed to serialize message", e);
@@ -202,6 +204,7 @@ public class SocketConnection implements Closeable {
             // Ler dados exatos da mensagem
             byte[] data = new byte[length];
             dataIn.readFully(data);
+            LockSupport.parkNanos(50000); // 50us
             
             // Deserialize do JSON - força o tipo concreto Message
             return serializer.deserialize(data, sd.model.Message.class);