Initial implementation of voice works scanning.

JSMR.Infrastructure/Data/Repositories/VoiceWorks/VoiceWorkWriter.cs

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+using JSMR.Application.VoiceWorks.Commands.SetFavorite;
+using JSMR.Application.VoiceWorks.Ports;
+using JSMR.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace JSMR.Infrastructure.Data.Repositories.VoiceWorks;
+
+public class VoiceWorkWriter(AppDbContext context) : IVoiceWorkWriter
+{
+    public async Task<SetVoiceWorkFavoriteResponse> SetFavoriteAsync(SetVoiceWorkFavoriteRequest request, CancellationToken cancellationToken)
+    {
+        VoiceWork voiceWork = await GetVoiceWorkAsync(request.VoiceWorkId, cancellationToken);
+        voiceWork.Favorite = request.IsFavorite;
+
+        await context.SaveChangesAsync(cancellationToken);
+
+        return new SetVoiceWorkFavoriteResponse(request.VoiceWorkId, request.IsFavorite);
+    }
+
+    private async Task<VoiceWork> GetVoiceWorkAsync(int voiceWorkId, CancellationToken cancellationToken)
+    {
+        return await context.VoiceWorks.FirstOrDefaultAsync(voiceWork => voiceWork.VoiceWorkId == voiceWorkId, cancellationToken)
+            ?? throw new KeyNotFoundException($"Voice Work {voiceWorkId} not found.");
+    }
+}