refactor: properly rename connections-related tables; top-level namespaces

Database/Entities/ConnectionsPuzzle.cs

@@ -0,0 +1,45 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ConnectionsAPI.Database.Entities;
+public class ConnectionsPuzzle
+{
+    /// <summary>
+    /// Primary key of the entity
+    /// </summary>
+    public int Id { get; set; }
+
+    /// <summary>
+    /// When the entity was created (is the sync date)
+    /// </summary>
+    public DateTime CreatedDate { get; set; }
+
+    /// <summary>
+    /// When the puzzle was "printed" online
+    /// </summary>
+    public string PrintDate { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The name of the editor for the puzzle
+    /// </summary>
+    public string EditorName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The actual count of the puzzle
+    /// </summary>
+    public int Index { get; set; }
+
+    /// <summary>
+    /// The MD5 hash for the source content used to sync this puzzle
+    /// </summary>
+    public string ContentMD5 { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The categories associated with this puzzle
+    /// </summary>
+    public virtual ICollection<ConnectionsCategory> Categories { get; set; } = [];
+
+    [NotMapped]
+    public string? PrevPrintDate { get; set; }
+    [NotMapped]
+    public string? NextPrintDate { get; set; }
+}