v0.4.1: Datetime Rename and Crawler Fixes

Changed

• Renamed get_current_date() to get_current_datetime() - now returns full date, time, and timezone in human-readable format (e.g., "Wednesday, November 26, 2025 at 2:30 PM PST")

Fixed

• Fix XML element fallback logic in sitemap parser (empty XML elements are falsy, causing or fallback to fail)
• Don't cache empty crawl results to prevent persisting failed crawls
• Suppress noisy "ruthless removal did not work" messages from readability library

Full Changelog: v0.4.0...v0.4.1