Check and report size of user profiles on startup

NOTE: this is known to fail for permission reasons, the commit is in
fact just to save the code and serve as an example (and to be reverted
right away).

Relates to #20

ATxService/AutoTx.cs

@@ -403,6 +403,19 @@ namespace ATxService
             }
 
             Log.Debug(msg);
+
+            Log.Info("User Profile Directories:");
+            var profilesDir = new DirectoryInfo(@"C:\Users");
+            foreach (var userProfile in profilesDir.GetDirectories()) {
+                Log.Info(userProfile.Name);
+                try {
+                    var userProfileSize = FsUtils.GetDirectorySize(userProfile.FullName);
+                    Log.Info(userProfileSize);
+                }
+                catch (Exception e) {
+                    Log.Error($"getting size of [{userProfile.FullName}] failed: {e.Message}");
+                }
+            }
         }
 
         #endregion