Fix: SmartTransactionsController state should persist (#493)

* fix: set smartTransactionsState > persist equal to `true`

* feat: enable persistence for SmartTransactionsController state

SmartTransactionsController state now persisted across browser sessions by setting `persist: true` in `controllerMetadata`.

Changes:
- Set `persist: true` in SmartTransactionsController metadata
- Add `updateState` public method for testing
- Add test verifying state persistence between controller instances
- Update initialization test to verify persistence enabled

This allows features like migration scripts to access historical smart transaction data after browser restarts.

* fix: remove attempt at testing

* fix: remove `updateState`

Author: httpJunkie

src/SmartTransactionsController.ts

@@ -72,7 +72,7 @@ const controllerName = 'SmartTransactionsController';
 
 const controllerMetadata = {
   smartTransactionsState: {
-    persist: false,
+    persist: true,
     anonymous: true,
   },
 };