feat: add option to force unauthenticated media endpoints

lib/src/client.dart

@@ -144,6 +144,8 @@ class Client extends MatrixApi {
   Future<MatrixImageFileResizedResponse?> Function(
       MatrixImageFileResizeArguments)? customImageResizer;
 
+  final bool forceUnAuthMedia;
+
   /// Create a client
   /// [clientName] = unique identifier of this client
   /// [databaseBuilder]: A function that creates the database instance, that will be used.
@@ -184,6 +186,7 @@ class Client extends MatrixApi {
   /// Set [customImageResizer] to your own implementation for a more advanced
   /// and faster image resizing experience.
   /// Set [enableDehydratedDevices] to enable experimental support for enabling MSC3814 dehydrated devices.
+  /// Set [forceUnAuthMedia] to force unauthenticated media endpoints even if support is detected.
   Client(
     this.clientName, {
     this.databaseBuilder,
@@ -229,6 +232,7 @@ class Client extends MatrixApi {
     /// support.
     this.customRefreshTokenLifetime,
     this.typingIndicatorTimeout = const Duration(seconds: 30),
+    this.forceUnAuthMedia = false,
   })  : syncFilter = syncFilter ??
             Filter(
               room: RoomFilter(
@@ -1203,6 +1207,7 @@ class Client extends MatrixApi {
       AsyncCache<GetVersionsResponse>(const Duration(hours: 1));
 
   Future<bool> authenticatedMediaSupported() async {
+    if (forceUnAuthMedia) return false;
     final versionsResponse = await _versionsCache.fetch(() => getVersions());
     return versionsResponse.versions.any(
           (v) => isVersionGreaterThanOrEqualTo(v, 'v1.11'),