Complete the type modernization across all models. Adds Builder-typed
$query parameters and return types to all scope methods, typed parameters
on accessors, and PHPDoc on scopePaginateData/scopeApplyFilters.
Models updated: Address, EstimateItem, Expense, ExpenseCategory,
InvoiceItem, Item, Note, Tax, TaxType, Unit.
5 models needed no changes (Country, Currency, ImpersonationLog,
Module, UserSetting) as they had no untyped public methods.
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