feat: [esign] 전자계약 이메일 발신주소를 CONTACT_MAIL_FROM_ADDRESS로 분리

- EsignRequestMail, EsignOtpMail, EsignCompletedMail에 from 주소 명시
- config/mail.php에 contact_from_address 설정 추가
- .env의 CONTACT_MAIL_FROM_ADDRESS(contact@codebridge-x.com) 사용

app/Mail/EsignCompletedMail.php

@@ -7,6 +7,7 @@
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Address;
 use Illuminate\Mail\Mailables\Envelope;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Support\Collection;
@@ -24,6 +25,7 @@ public function __construct(
     public function envelope(): Envelope
     {
         return new Envelope(
+            from: new Address(config('mail.contact_from_address', config('mail.from.address')), config('mail.from.name')),
             subject: "[SAM] 전자계약 서명 완료 - {$this->contract->title}",
         );
     }

app/Mail/EsignOtpMail.php

@@ -5,6 +5,7 @@
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Address;
 use Illuminate\Mail\Mailables\Envelope;
 use Illuminate\Queue\SerializesModels;
 
@@ -20,6 +21,7 @@ public function __construct(
     public function envelope(): Envelope
     {
         return new Envelope(
+            from: new Address(config('mail.contact_from_address', config('mail.from.address')), config('mail.from.name')),
             subject: '[SAM] 전자계약 인증 코드',
         );
     }

app/Mail/EsignRequestMail.php

@@ -7,6 +7,7 @@
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Address;
 use Illuminate\Mail\Mailables\Envelope;
 use Illuminate\Queue\SerializesModels;
 
@@ -25,6 +26,7 @@ public function envelope(): Envelope
         $prefix = $this->isReminder ? '[리마인더] ' : '';
 
         return new Envelope(
+            from: new Address(config('mail.contact_from_address', config('mail.from.address')), config('mail.from.name')),
             subject: "{$prefix}[SAM] 전자계약 서명 요청 - {$this->contract->title}",
         );
     }

config/mail.php

@@ -115,4 +115,6 @@
         'name' => env('MAIL_FROM_NAME', 'Example'),
     ],
 
+    'contact_from_address' => env('CONTACT_MAIL_FROM_ADDRESS', env('MAIL_FROM_ADDRESS', 'hello@example.com')),
+
 ];