refactor: backend→lotto 서비스 리네이밍 + lotto.db 레거시 테이블 스키마 제거

- backend/ → lotto/ 디렉토리 이동
- docker-compose: lotto-backend→lotto, lotto-frontend→frontend
- deploy scripts, nginx, agent-office config 네이밍 일괄 반영
- lotto/app/db.py에서 todos·blog_posts CREATE TABLE 제거 (personal로 이관 완료)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -1,12 +1,12 @@
 name: webpage
 
 services:
-  backend:
+  lotto:
     build:
-      context: ./backend
+      context: ./lotto
       args:
         APP_VERSION: ${APP_VERSION:-dev}
-    container_name: lotto-backend
+    container_name: lotto
     restart: unless-stopped
     ports:
       - "18000:8000"
@@ -131,7 +131,7 @@ services:
       - TELEGRAM_WEBHOOK_URL=${TELEGRAM_WEBHOOK_URL:-}
       - TELEGRAM_WIFE_CHAT_ID=${TELEGRAM_WIFE_CHAT_ID:-}
       - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY:-}
-      - LOTTO_BACKEND_URL=${LOTTO_BACKEND_URL:-http://lotto-backend:8000}
+      - LOTTO_BACKEND_URL=${LOTTO_BACKEND_URL:-http://lotto:8000}
       - LOTTO_CURATOR_MODEL=${LOTTO_CURATOR_MODEL:-claude-sonnet-4-5}
       - CONVERSATION_MODEL=${CONVERSATION_MODEL:-claude-haiku-4-5-20251001}
       - CONVERSATION_HISTORY_LIMIT=${CONVERSATION_HISTORY_LIMIT:-20}
@@ -193,7 +193,7 @@ services:
 
   frontend:
     image: nginx:alpine
-    container_name: lotto-frontend
+    container_name: frontend
     restart: unless-stopped
     depends_on:
       - music-lab