refactor(sentry): standardize exceptions to prevent Sentry minification

lib/main/exceptions/cache_exception.dart

@@ -1,16 +1,27 @@
-
 import 'package:equatable/equatable.dart';
 
 abstract class CacheException with EquatableMixin implements Exception {
-
   final String? message;
 
   const CacheException({this.message});
+
+  String get exceptionName;
+
+  @override
+  String toString() {
+    if (message != null) {
+      return '$exceptionName: $message';
+    }
+    return exceptionName;
+  }
 }
 
 class UnknownCacheError extends CacheException {
   const UnknownCacheError({String? message}) : super(message: message);
 
   @override
-  List<Object> get props => [];
-}
+  String get exceptionName => 'UnknownCacheError';
+
+  @override
+  List<Object?> get props => [message];
+}