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_daily_opening_rule.py

@@ -0,0 +1,20 @@
+import sqlite3
+
+def migrate():
+    conn = sqlite3.connect('waiting_system.db')
+    cursor = conn.cursor()
+    
+    try:
+        # daily_opening_rule 컬럼 추가 (기본값: flexible - 기존 동작과 유사하게 다음날로 넘기는 것 등 허용)
+        # strict: 1일 1회 개점만 허용
+        # flexible: 2회 이상 개점 허용 (다음날로 처리)
+        cursor.execute("ALTER TABLE store_settings ADD COLUMN daily_opening_rule TEXT DEFAULT 'strict'")
+        print("Added column daily_opening_rule to store_settings")
+    except sqlite3.OperationalError as e:
+        print(f"Column already exists or error: {e}")
+        
+    conn.commit()
+    conn.close()
+
+if __name__ == "__main__":
+    migrate()