feat: enhance domain reading with file watching and Redis polling

[pigri]

• Implemented file watching for domain configuration files using the notify crate, allowing for automatic updates when changes are detected.
• Added polling mechanism for Redis-based domain reading to periodically check for updates.
• Introduced SHA256 hash-based change detection to optimize domain data caching.
• Updated Cargo.toml to include the notify dependency and adjusted Cargo.lock accordingly.