订阅费用审计与清理

Please analyze my credit card statements from ~/finances/statements/ folder:
1. Identify all recurring subscription charges
2. Group them by category (streaming, software, news, etc.)
3. Calculate monthly and annual totals
4. Flag any subscriptions that:
   - Have very similar functions (like multiple streaming services)
   - I haven't used in the past 30 days (if usage data available)
   - Have increased in price recently
5. Create a summary with recommendations for potential cancellations