fix(headline-details): filter similar headlines by topic and status

- Updated the filter criteria in SimilarHeadlinesBloc to include both topic ID and content status
- Added ContentStatus import from core package
- Modified the filter map to include 'status': ContentStatus.active.name
- This change ensures that only active headlines from the same topic are fetched

Author: fulleni

lib/headline-details/bloc/similar_headlines_bloc.dart

@@ -2,7 +2,7 @@ import 'dart:async';
 
 import 'package:bloc/bloc.dart';
 import 'package:core/core.dart'
-    show Headline, HttpException, PaginationOptions, SortOption, SortOrder;
+    show ContentStatus, Headline, HttpException, PaginationOptions, SortOption, SortOrder;
 import 'package:data_repository/data_repository.dart';
 import 'package:equatable/equatable.dart';
 
@@ -28,7 +28,11 @@ class SimilarHeadlinesBloc
     try {
       final currentHeadline = event.currentHeadline;
 
-      final filter = <String, dynamic>{'topic.id': currentHeadline.topic.id};
+      // Filter by topic ID and ensure only active headlines are fetched.
+      final filter = <String, dynamic>{
+        'topic.id': currentHeadline.topic.id,
+        'status': ContentStatus.active.name,
+      };
 
       final response = await _headlinesRepository.readAll(
         filter: filter,