v0.2.0

• Implement SensitiveDataFilter class with 23+ default sensitive fields
• Automatic filtering of passwords, tokens, API keys, credit cards, etc.
• Case-insensitive matching with partial key matching support
• Recursive filtering for nested dicts and lists
• Configurable custom sensitive fields via DJANGO_SONAR settings
• Apply filter to POST/GET data, headers, and session data
• Refactor core module structure (parsers, collectors, filters)
• Add comprehensive test coverage (13+ tests for filtering)
• Update README with security documentation