Integrate SeaweedFS for S3-compatible file storage and photo upload (#254)

web/backend/Domain/Domain.Entities/Entities/Photo.cs

@@ -0,0 +1,17 @@
+namespace Domain.Entities;
+
+public sealed class Photo
+{
+    // PK
+    public Guid PhotoId { get; set; }
+
+    // FK References
+    public Guid UploadedById { get; set; }
+
+    // Attributes
+    public string? Hyperlink { get; set; }
+
+    // Audit Fields
+    public DateTime UploadedAt { get; set; }
+    public byte[]? RowVersion { get; set; }
+}