Auto-append .latent extension if missing on save

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nodes.py

@@ -21,6 +21,8 @@ class SaveLatentAbsolute:
 
     def save(self, samples, path):
         path = os.path.expanduser(path)
+        if not path.endswith(".latent"):
+            path += ".latent"
         os.makedirs(os.path.dirname(path), exist_ok=True)
 
         tensors = {}