GuestLog - StayEntry detail view and improvements:

- Added detail view for StayEntries.
- Added button to delete StayEntries.
- Improve queries of StayEntries using a "query config" record.
- Enabled LazyLoading for all database relations. This will make easier to find cases where required relations aren't explicitly loaded.

src/Somnia.GuestLog/GuestConsts.cs

@@ -10,6 +10,8 @@ public static class GuestConsts
 
     public const string Page_StayEntry_List = "/stayEntries";
     public const string Page_StayEntry_New = "/stayEntries/new";
+    public const string Page_StayEntry_Detail = $"/stayEntries/d/{Page_StayEntry_Detail_Param_Id}";
+    public const string Page_StayEntry_Detail_Param_Id = "{StayId:long}";
 
 
     public const string DataList_DocumentTypes = "DocumentType";