- Prevent overwriting snapshots that have valid response codes
- Ensure URL is removed from queue when snapshot update is skipped
- Add last_crawled timestamp tracking for better crawl scheduling
- Remove SkipIdenticalContent flag, simplify content deduplication logic
- Update database schema with last_crawled column and indexes
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
