refactor(bloc): rename state property for clarity

- Replace 'currentFeedItemCount' with 'processedContentItemCount' in multiple BLoC classes
- Update property name in EntityDetailsBloc, HeadlinesFeedBloc, and HeadlinesSearchBloc
- This change provides a more accurate description of the property's purpose

Author: fulleni

lib/entity_details/bloc/entity_details_bloc.dart

@@ -212,7 +212,7 @@ class EntityDetailsBloc extends Bloc<EntityDetailsEvent, EntityDetailsState> {
         feedItems: headlineResponse.items,
         user: currentUser,
         adConfig: remoteConfig.adConfig,
-        currentFeedItemCount: state.feedItems.length,
+        processedContentItemCount: state.feedItems.length,
       );
 
       emit(

lib/headlines-feed/bloc/headlines_feed_bloc.dart

@@ -113,7 +113,7 @@ class HeadlinesFeedBloc extends Bloc<HeadlinesFeedEvent, HeadlinesFeedState> {
         feedItems: headlineResponse.items,
         user: currentUser,
         adConfig: remoteConfig.adConfig,
-        currentFeedItemCount: state.feedItems.length,
+        processedContentItemCount: state.feedItems.length,
       );
 
       emit(

lib/headlines-search/bloc/headlines_search_bloc.dart

@@ -112,7 +112,7 @@ class HeadlinesSearchBloc
                 feedItems: headlines,
                 user: currentUser,
                 adConfig: appConfig.adConfig,
-                currentFeedItemCount: successState.items.length,
+                processedContentItemCount: successState.items.length,
               );
               emit(
                 successState.copyWith(