Get cache metadata with formatted displays

Retrieves cache metadata including download date, file size, and record count. Formats age display (e.g., "Today", "3 days ago", "2 weeks ago") and size display (e.g., "650 KB") for user-friendly presentation.

Usage

get_cache_metadata()

Value

List with metadata fields, or NULL if cache unavailable or invalid: - download_date: Date cache was created - n_records: Number of taxa records - file_size_bytes: File size in bytes - age_days: Numeric age in days - age_display: Human-readable age string - size_display: Human-readable size string - columns: Character vector of column names - cache_version: Cache format version