Updated with scheduler

DEMO.md

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+# Demo Walkthrough: High-Speed Tracing
+
+This demo demonstrates tracing a `Timer.Counter` signal at 100Hz and verifying its consistency.
+
+### 1. Launch the Test Environment
+Start the validation environment which simulates a real-time app:
+```bash
+./Build/Test/Integration/ValidationTest
+```
+*Note: The test will wait for a trace command before finishing.*
+
+### 2. Connect the GUI
+In another terminal:
+```bash
+cd Tools/gui_client
+cargo run --release
+```
+
+### 3. Explore the Tree
+1.  On the left panel (**Application Tree**), expand `Root.App.Data.Timer`.
+2.  Click the `ℹ Info` button on the `Timer` node to see its configuration (e.g., `SleepTime: 10000`).
+
+### 4. Activate Trace
+1.  Locate the `Counter` signal under the `Timer` node.
+2.  Click the **📈 Trace** button.
+3.  The **Oscilloscope** in the center will immediately begin plotting the incremental counter.
+4.  Verify the **UDP Packets** counter in the top bar is increasing rapidly.
+
+### 5. Test Execution Control
+1.  Click the **⏸ Pause** button in the top bar.
+2.  Observe that the plot stops updating and the counter value holds steady.
+3.  Click **▶ Resume** to continue execution.