fix(config): keep dict entries with "/" in keys during config migration

The automatic field migration recursed into every dict and addressed each
leaf by a "/"-joined path. Keys that themselves contain "/" - e.g. the config
paths used as keys of adapter.homeassistant.config_entity_ids - were split
into path elements. set_nested_value() then created a "devices" entry with
an empty string default and failed further down, so every version migration
replaced the mapping by {"devices": ""}.

Migrate a dict whose keys contain "/" as one value instead of per key.

Signed-off-by: SchaafAlexander <86607129+SchaafAlexander@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/akkudoktoreos/config/configmigrate.py

@@ -497,7 +497,15 @@ def _migrate_matching_fields(
         if full_path in migrated_source_paths:
             continue
 
-        if isinstance(value, dict):
+        if isinstance(value, dict) and any("/" in str(k) for k in value):
+            # Keys containing "/" (e.g. config paths used as mapping keys) can not be
+            # addressed by a "/"-separated path - migrate the whole dict as one value.
+            try:
+                target_model.set_nested_value(full_path, value)
+                count += 1
+            except Exception:
+                skipped_paths.append(full_path)
+        elif isinstance(value, dict):
             count += _migrate_matching_fields(
                 value, target_model, migrated_source_paths, skipped_paths, full_path
             )