* refactor(store)!: reset to defaults before merging the on-disk state in reload
`Store::reload` / `reload()` previously merged the on-disk state into the
current in-memory store. It now resets the store to its defaults first,
so in-memory keys that are neither in the defaults nor on disk are
dropped. `reload_ignore_defaults` / `reload({ ignoreDefaults: true })`
is unchanged.
* test(store): cover reload resetting to the defaults before merging the on-disk state
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Co-authored-by: Lucas Nogueira <lucas@crabnebula.dev>