Converts a LayeredNetwork (LQN) to a Network (QN).

The conversion uses REPLY signals to model synchronous call blocking: when a task makes a synchCall, the server blocks until a REPLY signal arrives from the called task.

• Each synchCall creates a Request class and a Reply signal class
• The caller queue blocks after completing service until Reply arrives
• The callee processes the request and class-switches to Reply on completion
• Reply signal unblocks the caller and continues downstream

  Think → CallerQueue → CalleeQueue → CallerQueue (reply) → Think
               ↓ blocks      ↓ class switch to Reply    ↓ unblocks

This approach:

• Correctly models BLOCKING semantics (server waits for reply)
• Provides per-task queue metrics (queue length, utilization)
• Supports multi-tier call chains (A → B → C)
• Uses DES solver with REPLY signal support

When an entry has phase-2 activities, a Fork-Join structure handles the async continuation after reply:

  CallerQueue → CalleeQueue_Ph1 → Fork → { Reply → CallerQueue }
                                      → { Ph2Queue → Join }

Example usage:

LayeredNetwork lqn = new LayeredNetwork("MyLQN");
// ... define LQN model ...
Network model = LQN2QN.convert(lqn);
SolverDES solver = new SolverDES(model);
solver.getAvgTable();