Mark TempFiles class and members as obsolete

The TempFiles class, including its TempPath property, constructor,
and methods (Create, CleanUpFiles, CleanUp), is now marked with
the [Obsolete("Use memory cache instead of temp files.")] attribute.
This deprecates the use of temp files in favor of a memory cache
approach for future development.

EnvelopeGenerator.ServiceHost/Jobs/TempFiles.cs

@@ -2,12 +2,17 @@ using EnvelopeGenerator.ServiceHost.Extensions;
 
 namespace EnvelopeGenerator.ServiceHost.Jobs;
 
+[Obsolete("Use memory cache instead of temp files.")]
 public class TempFiles
 {
+
+    [Obsolete("Use memory cache instead of temp files.")]
     public string TempPath { get; }
 
     private readonly ILogger<TempFiles> _logger;
 
+
+    [Obsolete("Use memory cache instead of temp files.")]
     public TempFiles(ILogger<TempFiles> logger)
     {
         _logger = logger;
@@ -15,6 +20,8 @@ public class TempFiles
         TempPath = Path.Combine(tempDirectoryPath, "EnvelopeGenerator");
     }
 
+
+    [Obsolete("Use memory cache instead of temp files.")]
     public bool Create()
     {
         try
@@ -37,6 +44,8 @@ public class TempFiles
         }
     }
 
+
+    [Obsolete("Use memory cache instead of temp files.")]
     private bool CleanUpFiles()
     {
         try
@@ -56,6 +65,8 @@ public class TempFiles
         }
     }
 
+
+    [Obsolete("Use memory cache instead of temp files.")]
     public bool CleanUp()
     {
         try