Add waiting system application files

- Add main application files (main.py, models.py, schemas.py, etc.)
- Add routers for all features (waiting, attendance, members, etc.)
- Add HTML templates for admin and user interfaces
- Add migration scripts and utility files
- Add Docker configuration
- Add documentation files
- Add .gitignore to exclude database and cache files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

migrate_add_class_closure.py

@@ -0,0 +1,40 @@
+"""
+데이터베이스 마이그레이션: class_closure 테이블 추가
+"""
+import sqlite3
+
+def migrate():
+    # 데이터베이스 연결
+    conn = sqlite3.connect('waiting_system.db')
+    cursor = conn.cursor()
+
+    try:
+        # class_closure 테이블 생성
+        cursor.execute('''
+            CREATE TABLE IF NOT EXISTS class_closure (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                business_date DATE NOT NULL,
+                class_id INTEGER NOT NULL,
+                closed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                FOREIGN KEY (class_id) REFERENCES class_info (id)
+            )
+        ''')
+
+        # 인덱스 생성
+        cursor.execute('''
+            CREATE INDEX IF NOT EXISTS idx_class_closure_business_date
+            ON class_closure (business_date)
+        ''')
+
+        conn.commit()
+        print("✅ 마이그레이션 성공: class_closure 테이블이 추가되었습니다.")
+
+    except sqlite3.OperationalError as e:
+        print(f"❌ 마이그레이션 실패: {e}")
+        raise
+    finally:
+        conn.close()
+
+if __name__ == "__main__":
+    migrate()