Release v0.9.8

Release v0.9.8 (2025-08-22)

Full CLI migration to argparse subparsers
Enhanced FTS5 search with logical operators, input validation, and snippet support
Regex search fully integrated with caching and context characters
Persistent cache with –no-cache flags
Optimized cache refresh using batch DB checks and list comprehensions
Added CSV analysis subcommand with delimiter detection, stats, and export
Extended filetype support: .pptx, .epub, .odt, images with metadata
Unified metadata extraction for documents and images
Fixed bugs: import errors, watcher issues, PDF export fonts, cache reuse, relative imports
Ripple effect integration and colored CLI output restored