Set metadata for sav on certain paths

Closes #3282

PKHeX.Core/Editing/Program/StartupArguments.cs

@@ -27,11 +27,18 @@ public void ReadArguments(IEnumerable<string> args)
             {
                 var other = FileUtil.GetSupportedFile(path, SAV);
                 if (other is SaveFile s)
+                {
+                    s.Metadata.SetExtraInfo(path);
                     SAV = s;
+                }
                 else if (other is PKM pkm)
+                {
                     Entity = pkm;
+                }
                 else if (other is not null)
+                {
                     Extra.Add(other);
+                }
             }
         }
 

PKHeX.Core/Saves/Util/SaveUtil.cs

@@ -545,7 +545,10 @@ private static GameVersion GetIsG8SAV(byte[] data)
                 if (sav == null)
                     continue;
 
-                sav.Metadata.SetExtraInfo(split.Header, split.Footer);
+                var meta = sav.Metadata;
+                meta.SetExtraInfo(split.Header, split.Footer);
+                if (path is not null)
+                    meta.SetExtraInfo(path);
                 return sav;
             }
 #endif