Add last_crawled timestamp tracking to fix fetchSnapshotsFromHistory()
infinite loop when SkipIdenticalContent=true. Now tracks actual crawl
attempts separately from content changes via database DEFAULT timestamps.
- Add architecture documentation for versioned snapshots
- Update Makefile with improved build commands
- Update dependency versions in go.mod
- Add project notes and development guidelines
- Improve README with new features and instructions
- Add context support to database operations
- Implement versioned snapshots for URL history
- Update database queries to support URL timestamps
- Improve transaction handling with context
- Add utility functions for snapshot history
- Implement whitelist package for filtering URLs
- Support pattern matching for allowed URLs
- Add URL validation against whitelist patterns
- Include test cases for whitelist functionality
- Create separate robotsMatch package for robots.txt handling
- Implement robots.txt parsing with support for different directives
- Add support for both Allow and Disallow patterns
- Include robots.txt matching with efficient pattern matching
- Add test cases for robots matching
- Implement context-aware versions of network operations
- Add request cancellation support throughout network code
- Use structured logging with context metadata
- Support timeout management with contexts
- Improve error handling with detailed logging
- Replace custom error handling with xerrors package
- Enhance error descriptions for better debugging
- Add text utilities for string processing
- Update error tests to use standard errors package
- Add String() method to GeminiError
- Replace zerolog with Go's standard slog package
- Add ColorHandler for terminal color output
- Add context-aware logging system
- Format attributes on the same line as log messages
- Use green color for INFO level logs
- Set up context value extraction helpers
