startPerfMonitoring() {
      this.perfMetrics = {
        updates: 0,
        computations: 0,
        domUpdates: 0,
        startTime: Date.now()
      };
      this.model.store.on("change", () => {
        this.perfMetrics.updates++;
      });
      this.model.store.on("compute", () => {
        this.perfMetrics.computations++;
      });
    }
Starts performance monitoring for the model's store.

- Sets up initial metrics counters for updates, computations, and DOM updates.
- Begins tracking the performance of the model store.
- Records changes and computations triggered on the store.

@example
const devTools = new ModelDevTools(model);
devTools.startPerfMonitoring();

// After some operations on the model:
console.log(devTools.getPerfReport());
// Outputs the performance metrics report.