Add return types and typed parameters to remaining 10 models

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.

app/Models/Note.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
@@ -17,7 +18,7 @@ class Note extends Model
         return $this->belongsTo(Company::class);
     }
 
-    public function scopeApplyFilters($query, array $filters)
+    public function scopeApplyFilters(Builder $query, array $filters): void
     {
         $filters = collect($filters);
 
@@ -30,17 +31,17 @@ class Note extends Model
         }
     }
 
-    public function scopeWhereSearch($query, $search)
+    public function scopeWhereSearch(Builder $query, string $search): void
     {
         $query->where('name', 'LIKE', '%'.$search.'%');
     }
 
-    public function scopeWhereType($query, $type)
+    public function scopeWhereType(Builder $query, string $type): Builder
     {
         return $query->where('type', $type);
     }
 
-    public function scopeWhereCompany($query)
+    public function scopeWhereCompany(Builder $query): void
     {
         $query->where('notes.company_id', request()->header('company'));
     }