feat: [barobill] 바로빌 연동 관리 API 7개 엔드포인트 구현

- SOAP 기반 BarobillSoapService 생성 (MNG 코드 포팅)
- BarobillMember, BarobillConfig 모델 생성
- BarobillController 7개 메서드 (login, signup, status, URL 조회)
- FormRequest 검증 클래스 3개 생성
- 라우트 등록 (POST /barobill/login, /signup, GET /status 등)
- i18n 메시지 키 추가 (ko/en)
- config/services.php에 barobill 설정 추가

app/Models/Tenants/BarobillConfig.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models\Tenants;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class BarobillConfig extends Model
+{
+    use SoftDeletes;
+
+    protected $fillable = [
+        'name',
+        'environment',
+        'cert_key',
+        'corp_num',
+        'base_url',
+        'description',
+        'is_active',
+    ];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+    ];
+
+    public static function getActiveTest(): ?self
+    {
+        return self::where('environment', 'test')->first();
+    }
+
+    public static function getActiveProduction(): ?self
+    {
+        return self::where('environment', 'production')->first();
+    }
+
+    public static function getActive(bool $isTestMode = false): ?self
+    {
+        return $isTestMode ? self::getActiveTest() : self::getActiveProduction();
+    }
+}

app/Models/Tenants/BarobillMember.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace App\Models\Tenants;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class BarobillMember extends Model
+{
+    use SoftDeletes;
+
+    protected $table = 'barobill_members';
+
+    protected $fillable = [
+        'tenant_id',
+        'biz_no',
+        'corp_name',
+        'ceo_name',
+        'addr',
+        'biz_type',
+        'biz_class',
+        'barobill_id',
+        'barobill_pwd',
+        'manager_name',
+        'manager_email',
+        'manager_hp',
+        'status',
+        'server_mode',
+        'last_sales_fetch_at',
+        'last_purchases_fetch_at',
+    ];
+
+    protected $casts = [
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+        'deleted_at' => 'datetime',
+        'barobill_pwd' => 'encrypted',
+        'last_sales_fetch_at' => 'datetime',
+        'last_purchases_fetch_at' => 'datetime',
+    ];
+
+    protected $hidden = [
+        'barobill_pwd',
+    ];
+
+    public function tenant(): BelongsTo
+    {
+        return $this->belongsTo(Tenant::class);
+    }
+
+    public function getFormattedBizNoAttribute(): string
+    {
+        $bizNo = preg_replace('/[^0-9]/', '', $this->biz_no);
+        if (strlen($bizNo) === 10) {
+            return substr($bizNo, 0, 3).'-'.substr($bizNo, 3, 2).'-'.substr($bizNo, 5);
+        }
+
+        return $this->biz_no;
+    }
+
+    public function isTestMode(): bool
+    {
+        return $this->server_mode !== 'production';
+    }
+}