Include entity options in RegistryEntry.as_partial_dict

[emontnemery]

Proposed change

Include entity options in RegistryEntry.as_partial_dict

This is needed because sensor display precision is stored as an entity option

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[balloob]

This seems like an ever-growing list of options that we will sent to the frontend, and need to be loaded before we can show the UI. It feels like we should be smarter