feat: common code group management (separate table + CRUD)

backend/src/main/resources/db/migration/V10__add_system_config.sql

@@ -1,3 +1,5 @@
+CREATE SEQUENCE seq_system_config INCREMENT BY 50;
+
 CREATE TABLE tb_system_config (
     config_id BIGSERIAL PRIMARY KEY,
     config_key VARCHAR(100) NOT NULL UNIQUE,
@@ -19,3 +21,5 @@ INSERT INTO tb_system_config (config_key, config_value, description) VALUES
 ('notification_slack_enabled', 'false', 'Slack 알림 활성화'),
 ('notification_email_enabled', 'false', 'Email 알림 활성화'),
 ('file_upload_max_size', '10485760', '파일 업로드 최대 크기 (bytes)');
+
+CREATE SEQUENCE seq_system_config INCREMENT BY 50;

backend/src/main/resources/db/migration/V11__add_common_code_group.sql

@@ -0,0 +1,17 @@
+CREATE SEQUENCE sq_common_code_groups INCREMENT BY 50;
+
+CREATE TABLE tb_common_code_group (
+    id BIGSERIAL PRIMARY KEY,
+    group_code VARCHAR(50) NOT NULL UNIQUE,
+    group_name VARCHAR(255) NOT NULL,
+    description VARCHAR(500),
+    sort_order INTEGER DEFAULT 0,
+    created_at TIMESTAMP,
+    updated_at TIMESTAMP,
+    is_deleted CHAR(1) DEFAULT 'N'
+);
+
+INSERT INTO tb_common_code_group (group_code, group_name, sort_order)
+SELECT DISTINCT group_code, group_code, 0
+FROM tb_common_code
+WHERE is_deleted = 'N';