feat: 담당자에 소속·상호 필드 추가(#23)

- manager 테이블에 mg_affiliation(소속)·mg_company_name(상호) 컬럼 추가
  (공유 DB 반영 완료 + writable/database에 마이그레이션 SQL 기록)
- ManagerModel allowedFields, 등록/수정 폼(담당자명 아래), store/update 저장,
  목록에 소속·상호 열 추가

app/Controllers/Admin/Manager.php

@@ -77,6 +77,8 @@ class Manager extends BaseController
         $rules = [
             'mg_name'  => 'required|max_length[50]',
             'mg_category' => 'required|in_list[company,district,agency]',
+            'mg_affiliation'  => 'permit_empty|max_length[100]',
+            'mg_company_name' => 'permit_empty|max_length[100]',
             'mg_tel'   => 'permit_empty|max_length[20]',
             'mg_phone' => 'permit_empty|max_length[20]',
             'mg_email' => 'permit_empty|valid_email|max_length[100]',
@@ -88,6 +90,8 @@ class Manager extends BaseController
         $this->model->insert([
             'mg_lg_idx'        => admin_effective_lg_idx(),
             'mg_name'          => $this->request->getPost('mg_name'),
+            'mg_affiliation'   => $this->request->getPost('mg_affiliation') ?? '',
+            'mg_company_name'  => $this->request->getPost('mg_company_name') ?? '',
             'mg_dept_code'     => (string) ($this->request->getPost('mg_category') ?? ''),
             'mg_position_code' => $this->request->getPost('mg_position_code') ?? '',
             'mg_tel'           => $this->request->getPost('mg_tel') ?? '',
@@ -126,6 +130,8 @@ class Manager extends BaseController
         $rules = [
             'mg_name'  => 'required|max_length[50]',
             'mg_category' => 'required|in_list[company,district,agency]',
+            'mg_affiliation'  => 'permit_empty|max_length[100]',
+            'mg_company_name' => 'permit_empty|max_length[100]',
             'mg_state' => 'required|in_list[0,1]',
         ];
         if (! $this->validate($rules)) {
@@ -134,6 +140,8 @@ class Manager extends BaseController
 
         $this->model->update($id, [
             'mg_name'          => $this->request->getPost('mg_name'),
+            'mg_affiliation'   => $this->request->getPost('mg_affiliation') ?? '',
+            'mg_company_name'  => $this->request->getPost('mg_company_name') ?? '',
             'mg_dept_code'     => (string) ($this->request->getPost('mg_category') ?? ''),
             'mg_position_code' => $this->request->getPost('mg_position_code') ?? '',
             'mg_tel'           => $this->request->getPost('mg_tel') ?? '',