수정: 신규 DB 기준 관리자 템플릿 요청 스키마 보정

backend/src/db.js

@@ -470,7 +470,7 @@ async function ensureSchema() {
         id VARCHAR(64) PRIMARY KEY,
         request_type VARCHAR(20) NOT NULL,
         requester_id VARCHAR(64) NOT NULL,
-        source_tierlist_id VARCHAR(64) NOT NULL,
+        source_tierlist_id VARCHAR(64) NULL DEFAULT NULL,
         source_topic_id VARCHAR(120) NOT NULL,
         target_topic_id VARCHAR(120) NOT NULL DEFAULT '',
         status VARCHAR(20) NOT NULL DEFAULT 'pending',
@@ -478,6 +478,9 @@ async function ensureSchema() {
         description_snapshot TEXT NOT NULL,
         thumbnail_src_snapshot VARCHAR(255) NOT NULL DEFAULT '',
         items_json LONGTEXT NOT NULL,
+        groups_json LONGTEXT NOT NULL,
+        board_items_json LONGTEXT NOT NULL,
+        show_character_names_snapshot TINYINT(1) NOT NULL DEFAULT 0,
         created_at BIGINT NOT NULL,
         updated_at BIGINT NOT NULL,
         INDEX idx_template_requests_status_created (status, created_at),