yaml.safe_load has no constructor for HA's `!include`/`!secret`/etc. tags
and raised ConstructorError on any real configuration.yaml. Add a
multi_constructor on `!` that generically wraps scalar/sequence/mapping
payloads in a TaggedValue, and a matching representer that re-emits the
same tag + payload — normalization stays idempotent across passes and key
sorting is unaffected by tagged values.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
