hardened API decoding against server fields the models did not expect

The Talk room list crashed for a new account because the server omits
lastMessage for rooms without a visible message and the model required it.
Beyond that single field, a review of the Talk models against the OpenAPI
spec of the installed version (23.0.8) found the same crash class in several
places: closed enums over open server values (inCall bitmask, rich-object
types, actor and message types), a deleted parent sent as {id, deleted},
and the autocomplete status arriving as an object.

- json_serializable `checked: true`: decode errors now name class and field
- lists (rooms, messages, participants, autocomplete) decode per entry;
  a malformed entry is skipped and reported via ClientErrorReporter
- unknownEnumValue fallbacks for all response enums of Talk and breakers
- lastMessage nullable; inCall as bitmask; deleted parent placeholder;
  autocomplete status object/string; fixed shareWithDisplayNameUnique key
- GetRoomParams no longer sends null query parameters

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HrepDTL4qDe35TuS29sLW3

lib/api/marianumcloud/talk/create_room/create_room_params.g.dart

@@ -7,14 +7,17 @@ part of 'create_room_params.dart';
 // **************************************************************************
 
 CreateRoomParams _$CreateRoomParamsFromJson(Map<String, dynamic> json) =>
-    CreateRoomParams(
-      roomType: (json['roomType'] as num).toInt(),
-      invite: json['invite'] as String,
-      source: json['source'] as String?,
-      roomName: json['roomName'] as String?,
-      objectType: json['objectType'] as String?,
-      objectId: json['objectId'] as String?,
-    );
+    $checkedCreate('CreateRoomParams', json, ($checkedConvert) {
+      final val = CreateRoomParams(
+        roomType: $checkedConvert('roomType', (v) => (v as num).toInt()),
+        invite: $checkedConvert('invite', (v) => v as String),
+        source: $checkedConvert('source', (v) => v as String?),
+        roomName: $checkedConvert('roomName', (v) => v as String?),
+        objectType: $checkedConvert('objectType', (v) => v as String?),
+        objectId: $checkedConvert('objectId', (v) => v as String?),
+      );
+      return val;
+    });
 
 Map<String, dynamic> _$CreateRoomParamsToJson(CreateRoomParams instance) =>
     <String, dynamic>{

lib/api/marianumcloud/talk/create_room/create_room_response.g.dart

@@ -7,12 +7,21 @@ part of 'create_room_response.dart';
 // **************************************************************************
 
 CreateRoomResponse _$CreateRoomResponseFromJson(Map<String, dynamic> json) =>
-    CreateRoomResponse(
-        CreateRoomResponseData.fromJson(json['data'] as Map<String, dynamic>),
-      )
-      ..headers = (json['headers'] as Map<String, dynamic>?)?.map(
-        (k, e) => MapEntry(k, e as String),
+    $checkedCreate('CreateRoomResponse', json, ($checkedConvert) {
+      final val = CreateRoomResponse(
+        $checkedConvert(
+          'data',
+          (v) => CreateRoomResponseData.fromJson(v as Map<String, dynamic>),
+        ),
       );
+      $checkedConvert(
+        'headers',
+        (v) => val.headers = (v as Map<String, dynamic>?)?.map(
+          (k, e) => MapEntry(k, e as String),
+        ),
+      );
+      return val;
+    });
 
 Map<String, dynamic> _$CreateRoomResponseToJson(CreateRoomResponse instance) =>
     <String, dynamic>{
@@ -22,7 +31,12 @@ Map<String, dynamic> _$CreateRoomResponseToJson(CreateRoomResponse instance) =>
 
 CreateRoomResponseData _$CreateRoomResponseDataFromJson(
   Map<String, dynamic> json,
-) => CreateRoomResponseData(json['token'] as String);
+) => $checkedCreate('CreateRoomResponseData', json, ($checkedConvert) {
+  final val = CreateRoomResponseData(
+    $checkedConvert('token', (v) => v as String),
+  );
+  return val;
+});
 
 Map<String, dynamic> _$CreateRoomResponseDataToJson(
   CreateRoomResponseData instance,