Fix vault caching count and NoneType iteration issues

- Fix 'NoneType' object is not iterable error in decrypt_labs_remote_cdm
- Fix vault count display showing 0/3 instead of actual successful vault count

unshackle/core/cdm/decrypt_labs_remote_cdm.py

@@ -625,6 +625,7 @@ class DecryptLabsRemoteCDM:
 
         if "cached_keys" in session:
             cached_keys = session.get("cached_keys", [])
+            if cached_keys:
                 for cached_key in cached_keys:
                     all_keys.append(cached_key)
 

unshackle/core/vaults.py

@@ -74,7 +74,9 @@ class Vaults:
         for vault in self.vaults:
             if not vault.no_push:
                 try:
-                    success += bool(vault.add_keys(self.service, kid_keys))
+                    # Count each vault that successfully processes the keys (whether new or existing)
+                    vault.add_keys(self.service, kid_keys)
+                    success += 1
                 except (PermissionError, NotImplementedError):
                     pass
         return success