fix(android): use optBoolean for persistToken to prevent JSONException

Fix configuration error 'No value for persistToken' by using optBoolean()
instead of getBoolean(). The getBoolean() method throws JSONException
when the key doesn't exist, while optBoolean() returns the default value
(false) safely.

This allows configureNativeFetcher() to work when persistToken is not
provided in the options, which is the expected default behavior (tokens
are not persisted by default for security).

android/src/main/java/com/timesafari/dailynotification/DailyNotificationPlugin.kt

@@ -545,7 +545,8 @@ open class DailyNotificationPlugin : Plugin() {
             // SECURITY WARNING: JWT token storage
             // By default, tokens are NOT persisted to prevent storing bearer credentials at rest
             // If persistence is required, caller must explicitly opt-in with persistToken: true
-            val persistToken = options.getBoolean("persistToken") ?: false
+            // Use optBoolean() to avoid JSONException when key doesn't exist
+            val persistToken = options.optBoolean("persistToken", false)
             
             if (persistToken) {
                 Log.w(TAG, "SECURITY WARNING: JWT token will be persisted to unencrypted database. " +