pub fn parse_date_string(s: &str) -> Result<SystemTime, String>Expand description
Parse a date string into a SystemTime.
Supports:
- ISO format: “2024-01-15 10:30:00”, “2024-01-15T10:30:00”
- Relative: “yesterday”, “tomorrow”, “now”, “today”
- Relative offset: “1 day ago”, “2 hours ago”, “3 days”, “+1 week”
- Epoch: “@SECONDS”