feat: add comprehensive ProGuard/R8 rules for Capacitor plugins

ProGuard Rules (both android/app and test-app):
- Capacitor Plugin Protection: Keep Capacitor annotations and plugin methods
- DailyNotification Plugin Classes: Protect all plugin classes and methods
- Manager Classes: Keep all *Manager, *Storage, *Receiver classes
- Database Protection: Room database classes, entities, DAOs, migrations
- Error Handling: Keep error and exception classes
- Performance Classes: Keep optimization and performance monitoring classes
- System Classes: Protect Android system classes used by plugin
- Security Classes: Keep network and security-related classes
- Debugging: Preserve debug information and annotations

Key protections:
- @CapacitorPlugin and @PluginMethod annotations
- All com.timesafari.dailynotification.** classes
- Room database classes and migrations
- Android system classes (AlarmManager, NotificationManager, etc.)
- Network and security classes
- Debug attributes and signatures

This ensures the plugin remains functional after minification and prevents
critical classes from being stripped during release builds.

test-apps/daily-notification-test/android/app/proguard-rules.pro

@@ -19,3 +19,136 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+# =============================================================================
+# Capacitor Plugin Protection Rules
+# =============================================================================
+
+# Keep Capacitor Plugin annotations & your plugin facade
+-keep class com.getcapacitor.** { *; }
+-keep @com.getcapacitor.annotation.CapacitorPlugin class * { *; }
+-keepclassmembers class ** {
+  @com.getcapacitor.annotation.PluginMethod *;
+}
+
+# Keep DailyNotification plugin classes
+-keep class com.timesafari.dailynotification.** { *; }
+
+# Keep plugin method names and signatures
+-keepclassmembers class com.timesafari.dailynotification.DailyNotificationPlugin {
+  public *;
+}
+
+# Keep all plugin manager classes
+-keep class com.timesafari.dailynotification.*Manager { *; }
+-keep class com.timesafari.dailynotification.*Storage { *; }
+-keep class com.timesafari.dailynotification.*Receiver { *; }
+
+# Keep Room database classes
+-keep class com.timesafari.dailynotification.storage.** { *; }
+-keep class com.timesafari.dailynotification.database.** { *; }
+
+# Keep error handling classes
+-keep class com.timesafari.dailynotification.*Error* { *; }
+-keep class com.timesafari.dailynotification.*Exception* { *; }
+
+# Keep JWT and ETag managers
+-keep class com.timesafari.dailynotification.*JWT* { *; }
+-keep class com.timesafari.dailynotification.*ETag* { *; }
+
+# Keep performance and optimization classes
+-keep class com.timesafari.dailynotification.*Performance* { *; }
+-keep class com.timesafari.dailynotification.*Optimizer* { *; }
+
+# Keep rolling window and TTL classes
+-keep class com.timesafari.dailynotification.*Rolling* { *; }
+-keep class com.timesafari.dailynotification.*TTL* { *; }
+
+# Keep exact alarm and reboot recovery classes
+-keep class com.timesafari.dailynotification.*Exact* { *; }
+-keep class com.timesafari.dailynotification.*Reboot* { *; }
+-keep class com.timesafari.dailynotification.*Recovery* { *; }
+
+# Keep enhanced fetcher classes
+-keep class com.timesafari.dailynotification.*Enhanced* { *; }
+-keep class com.timesafari.dailynotification.*Fetcher* { *; }
+
+# Keep migration classes
+-keep class com.timesafari.dailynotification.*Migration* { *; }
+
+# Keep channel manager
+-keep class com.timesafari.dailynotification.ChannelManager { *; }
+
+# Keep permission manager
+-keep class com.timesafari.dailynotification.PermissionManager { *; }
+
+# Keep scheduler classes
+-keep class com.timesafari.dailynotification.*Scheduler* { *; }
+
+# =============================================================================
+# Android System Classes
+# =============================================================================
+
+# Keep Android system classes used by the plugin
+-keep class android.app.AlarmManager { *; }
+-keep class android.app.NotificationManager { *; }
+-keep class android.app.NotificationChannel { *; }
+-keep class android.app.PendingIntent { *; }
+-keep class androidx.work.WorkManager { *; }
+-keep class androidx.core.app.NotificationCompat { *; }
+
+# Keep broadcast receiver classes
+-keep class android.content.BroadcastReceiver { *; }
+-keep class android.content.Intent { *; }
+
+# =============================================================================
+# Room Database Protection
+# =============================================================================
+
+# Keep Room database classes
+-keep class androidx.room.** { *; }
+-keep class * extends androidx.room.RoomDatabase { *; }
+-keep @androidx.room.Entity class * { *; }
+-keep @androidx.room.Dao class * { *; }
+
+# Keep Room database migrations
+-keep class * extends androidx.room.migration.Migration { *; }
+
+# =============================================================================
+# Gson Protection (if used)
+# =============================================================================
+
+# Keep Gson classes if used for JSON serialization
+-keep class com.google.gson.** { *; }
+-keep class * implements com.google.gson.TypeAdapterFactory { *; }
+-keep class * implements com.google.gson.JsonSerializer { *; }
+-keep class * implements com.google.gson.JsonDeserializer { *; }
+
+# =============================================================================
+# Debugging and Development
+# =============================================================================
+
+# Keep debug information for development builds
+-keepattributes SourceFile,LineNumberTable
+-keepattributes Signature
+-keepattributes Exceptions
+-keepattributes InnerClasses
+-keepattributes EnclosingMethod
+
+# Keep generic signatures for reflection
+-keepattributes Signature
+
+# Keep annotations
+-keepattributes *Annotation*
+
+# =============================================================================
+# Network and Security
+# =============================================================================
+
+# Keep network-related classes
+-keep class java.net.** { *; }
+-keep class javax.net.ssl.** { *; }
+
+# Keep security-related classes
+-keep class java.security.** { *; }
+-keep class javax.crypto.** { *; }